Does it have the phone app though like an iPhone? I didn’t think it does?
If you mean does it come with the Apple iPhone app or can you get that app, then no.
However, just like there are alternatives to pretty much ALL of the stock apps from Apple on iDevices, there are plenty of telephony + texting app alternatives too. Open the App Store and type in a search for VOIP.
Some I've used/like: Talkatone, Comcast Voice and Google Voice... but there are plenty beyond those.
Telephony is not that complicated so there are plenty of apps that can handle voice calls in and out + texting in and out. My iPad Mini 6 "rings" when someone calls me and those on the other end of the call can't tell that I'm NOT using a cell phone. When texting with Apple people, I can use Messages and when texting with non-Apple people, I text from within the VOIP app.
My favored VOIP app last few years is Google Voice. And a bonus to using that one is that with a device called Obihai, I can connect the home phone lines to the same number. So when at home, both my iPad and my house phones ring when someone calls. And when calling out, I can use either iPad (buds + mic) or the house phones to make calls. Cost of all of that mobile and home phone/fax service through GV? $0. GV via Obhai connection even works with the home alarm system.
For cell service, Mini 6 has the amazing $10 for 5GB or 5 months prepaid offering from Tmobile available. So basically, I have continuous 5G ultra cellular service including tethering for $25 PER
YEAR. If I managed to burn through 5GB in less than 5 months I can simply renew the service sooner than 5 months. But that hasn't happened in 3 rounds yet, partially because I mostly live & work within free wifi zones and don't really use that much cellular anyway.
What are the bigger downsides? For me, the ONLY one is that Mini doesn't fit in a pocket (except suit jacket pocket), so it occupies a hand or I tuck it under an arm. All these "I don't see the point" stances of foldable iDevices fall on deaf ears here. If Mini could fold/roll, it becomes pocketable iPad. That would be great!
For others, certain Apple technologies pretty much require an iPhone plus much more expensive iPhone cell service: Watch & CarPlay (I prefer traditional watches and my car comes with a a pretty great CarPlay-like featureset to which my iPad mini will connect and I can do various things that are CarPlay-like with the stock system, such as make/take cell calls, play music on iPad, etc). 911 service is available (e911) but not as straightforward in terms of exact location (but most people never actually use 911 service in their entire lives, or are able to communicate with the dispatcher to convey exactly where they are, or others involved in the incident are also using 911, etc). Cameras are better on better iPhones but Mini 6 will shoot 4K too. No faceID but touchID in the power button is a terrific quick login option for me.
On the other hand, camera is almost flush (minimal bump), no notch/dynamic island because front facing camera fits (disappears) in bezel, cell service is relatively dirt cheap, the obihai option for those that want their home phones working on the same GV line (free home phone long distance & local-alarm monitoring line-fax line-etc), iPad seems to not get "long in tooth" as fast as more expensive iPhones so I expect to be using this 6 through 3-4 more generations of annual iPhone upgrade mania while still having access to every app-security upgrades-lastest iOS updates-etc. Not dropping $1000+ every year or two is a big savings vs. buying new Mini generations every 3-5 years. I used Mini 2 this way for over 6 years (or 6 generations of iPhone or about $6,000). I use eSIM but there is also a SIM slot available. Mini 6 is
already USB-C. IMO, every single app we use is generally a better experience on more screen RE and Mini offers a LOT more screen RE than even the pro max ultra super duper mach 7.
To anyone intrigued but carrying doubts, it's easy enough to try this approach. Download a VOIP app to iPhone (or existing iPad) and basically "fake" it for a while. Many VOIP apps like Talkatone and GV will give you a free number. So try some VOIP for free and enlist a friend to let you call and take a call from them, text and receive some texts from them so you can experience this first hand. If you like, for the texting tests, you can text your existing phone number so you can play BOTH roles to see how it works. If you use an iPad that is wifi only, just do your experimenting while in wifi because a cellular-connected iPad will work the same when out & about.
If you find it good enough, you have a new option for your next "phone" or a backup option. If not, it didn't cost you anything to test this concept in a pretty complete way. Many people seem locked in on iPhone being the absolute core product everyone must have. However, if what makes it core is basically the phone app functionality, an iPod touch, iPad, MB or Desktop Mac can easily handle voice calls and texting too. Long before there was an iPhone, I would sometimes use Skype or similar to make/take calls with regular phones on my Laptops or Desktop. This ability for other tech to stand in for a hand-held piece of pocketable tech has been around since at least the mid 1990s. There's plenty of great apps for that.
Is this for everyone? Of course not- nothing is for everyone. But it will work fine for some. For me, I don't feel like I'm missing a thing... especially when considered against the overall economics of the very popular alternative.