I don't know when it'll be as I've not been doing any GB dev since the GBcompo ended, but when I do get GBS 3.0, exporting a .pocket version of this game will probably be the first thing I do :D
I'm surprised the Pocket doesn't let you play GB roms even though it lets you play GB carts. I guess it's to discourage piracy?
Yes, Pocket is not able to run GB games from SD to avoid piracy.
Migrating a project from GB Studio 2.0 to 3.0 can be a lot of works because it generally break a lot of stuff.
I created a fork a GB Studio 2 that export natively game in pocket file.
https://github.com/BestPig/gb-studio#analogue-pocket-export
So it should be easy to port your game without the pain of migrating to GB Studio 3.0 :)
If you have any issue with it, don't hesitate to contact me.
