I'm afraid I haven't gone near it since. How you been able to confirm that the recent Csound Android libraries work Ok? I'm not sure how many people are using them, and I've seen reports on the mailing list about issues. I think we'd need to create an vanilla android app using the current Csound libraries just to make sure they work Ok.
I've more of less moved away from Unity/Unreal in favour of web based game engines such as BabylonJS and Phaser3. I use them with the csound-wasm build and they work fine and I can run them on any platform that supports a browser.
I was speaking with Steven Yi yesterday and he was talking about producing a more game engine friendly version of the Csound Android package, but I'm not sure what kind of time frame he was talking about.