Apple Maps does give you route options if there are feasible alternatives
I have not seen this, but will try it again soon.
It would be nice to give options and let the user determine if they are feasible or not. My commute has many different paths to take, so I am not sure why I wouldn't see an option to choose a route.
Maybe I went looking for it once, and couldn't find it, so I haven't bother checking again, thinking that there was not that option. Or maybe I just do not know how to find the option for alternate routes.
I have at times done the same trip on all three mapping apps and they will pick the same route with the same arrival time.
I have done this as well, but just with Apple Maps and Waze. Using the same route, they had different times. Only by 2-3 minutes, but still, one was more off, and it was always Apple Maps the few times I compared.
Never have an issue with Siri in the car via CarPlay, fires up every time mainly via the "Hey Siri" command and I use it to set navigation going, make calls and both reading out and sending texts.
I have a love/hate relationship with Siri. When it works, it is great, but many times, it just doesn't.
3-4 years ago, I was driving in an area that I was not familiar with, and I was really low on fuel. I asked Siri on my CarPlay to give me directions to the closest gas station, which Siri directed me to a station that was about 10 miles away, which was surprising, because I knew there was one closer, but in the opposite direction of my home and the way I was traveling.
I followed Siri's directions, and the gas station was closed. It look like it has been closed for years.
Not a big deal, I just started driving again, asking Siri for directions to another station, which showed one about 2 miles away. I followed the directions, and about halfway there I felt like I was having déjà vu. Siri took me back to the closed gas station.
I asked Siri in many different ways, of basically asking the same thing, such as "where is the next closest station", or "where is the closest Royal Farms", since there was a lot of them, and the closed station was not Royal Farms. It would always direct me to the closed gas station, like a scene out of a b-rated horror movie.
I started driving again, really frustrated, and traveled in a direction that I knew there was a station, but it was 15 miles away. About 7 miles in, I asked Siri to find me the closest station again, which Siri gave me the same option it did many times before.
I drove to the gas station that I knew about, happy I made it there without running out of fuel. I filed up, updated my car fuel and maintenance app, and before I left for home, I just wanted to see what Siri would recommend as the closest gas station, and it was still directing me to go to that closed gas station, even though I was at one already, and I was sure there was many others in between me and that closed one that Siri kept telling me to go to.
I have another CarPlay/Siri story, but not really navigation related:
A month ago I was trying to get a prescription filled at a Walgreen's. After many days of the Walgreen's stating that they would have the prescription in, but failing to due to, I decided to try a different Walgreen's.
I was driving, using CarPlay, and asking Siri in every way possible to find and/or call the number of the Walgreen's I was looking for, it just wouldn't so it. It would find me other Walgreen's in different states, tell me the location and give me directions to the Walgreen's I was looking for but not call it nor give me the number, tell me that there was not a Walgreen's near by, or just say "Okay", and do nothing.
I said it many different ways, and the same way over an over, and got different results, but it took about 20 or 30 times before it called the correct Walgreen's for me.
I had many similar situations with Siri in the past, it is very frustrating. Keep in mind that these problem situations happened on three different CarPlay head units, a few different iPhones, and and few different iOS versions.