Well, usually those re-compilers or transpilers just translate the binary to some sort of intermediate language and then any backend should be able to compile it for your target system. So, in theory those handheld could be targeted. Problem with this project is that it's not just "start transpiler, load rom, click go and your port is ready". It's more like "ok, here's your game logic. Now implement the rest (or use several other projects and duct tape their libraries together to get what you want).

Yes, that was kind of my point. N64 emulation on handhelds often sucks. So being able to have games recompiled to be better optimized on something like the Miyoo Mini would be great. While it is cool for the PC because it can allow for enhancements much more easily, just getting games up and running at a minimum is not an issue for any PC made in the last decade or two.