Having said all that about RAM, I must say it doesn‘t seem to be a big deal when it comes to certain apps. That Divinity game people are talking about requires a minimum of an A12, but doesn’t seem to have much RAM requirements. The Air 3, Mini 5 and iPad 8 all have A12 and 3GB RAM, while the 2017 iPad Pros have A10X and 4GB RAM. Some people were advising prospective buyers of the Air 3 in 2019 to opt for the Pro 2017 instead for its extra RAM and better multi-core performance. Looks like those things didn’t matter when it comes to Divinity.
The Apple app compatibility may show A12 minimum but developer notes say otherwise and I can confirm that the game will refuse to run on Air 3. You can download and install on the Air 3 but when you run it, it will tell you it's not compatible and to request for a refund.