Here's a few misc. projects w/ Android versions I think would be really cool to see get Switch ports eventually
Dr. Mario Mania - Basically a fanmade ultimate edition of Dr. Mario that features multiple modes from different games in the series, custom levels, multiplayer, and more. It's Godot based.
Super Mario Bros. Remastered Android - An Android fork of SMBR which is basically a similar concept to Dr. Mario Mania except for Super Mario Bros. 1 / The Lost Levels. Full recreations of SMB1, TLL, SMB Special & the All Night Nippon versions, custom levels, characters, and resource packs, new modes, and more! It's also Godot based.
Plants vs Zombies Ultimate (Discord linked) - A fangame / mod of PvZ 1 that incorporates content from all versions of it, including the various Chinese versions which add a ton of new plants, modes, and even a whole secondary campaign based on Journey to the West. All content is available in English (a lot for the first time).
Yokoi - Game & Watch Emulator - Yokoi is a Game & Watch (and clone systems) emulator based off of MAME that provides access to nearly all main releases of Game & Watch titles (a lot more than what the RetroArch recreations can provide). It is a 3DS based emulator, but it does have an Android version.
The Legend of Zelda Link's Awakening DX HD - A fan remake of LoZ:LA DX originally made for PC, but updated to run on Android and more. It allows you to play the original version of LoZ:LA with a lot of QoL features, and a much more zoomed out view.
AM2R for Android - A very popular fan remake of Metroid 2, repackaged for Android.
I'd also love to see more general emulators make their way to Switch like MAME4Droid (Arcade / Various Misc systems), JL-Mod (J2ME Phone games), EKA2L1 (N-Gage / Symbian), touchHLE (old iOS games), and more, but yeah any of these would be really cool to see eventually make their way if any one who's able to is interested