The “not updating your OS” message is pretty much industry standard unfortunately. It is particularly bad with Apple products. There was a similar message when Big Sur and the M1 chip came out for Macs. I have several products that I learned the hard way on this one to the point of having to roll back to a previous version of the macOS, and it was a major pain. This is not just an Allen & Heath problem. It is more of an Apple/developer problem as Apple is not going to wait for developers to update their products and developers have to see the value in re-coding their software. I will also say, in many many cases, I have not had nearly as many issues with Windows when it comes to OS upgrades. I don’t normally and have not had any compatibility issues with Win11 so far with any equipment.
Having said all that. I can’t fathom a company that doesn’t support Apple/Windows/and Android products. There is no excuse for A&H to not have Android support for all of their current supported products.