This is why if you ever go to a protest, always make sure you bring a burner phone, preferably without SIM if it doesn't have an eSIM. If you have an old phone and can do it yourself or afford to have someone else do it, but replace the SSD on your burner with something fresh to ensure even if you wipe the phone they can't get the old data off your old SSD. This is the feds we're talking about, of course they're gonna have access to software that'll allow them to reconstruct the data on a wiped drive as an option. Then all you have to do is to just not store any information you don't want getting out onto your burner, anything that the feds can easily use against you.
Unless you're a major target, I doubt they're gonna search your home for your actual phone or go through your contacts as well.
If you're playing offline with friends, Emudeck has Ryujinx available. All you'd need is to either dump your cartridge if you can (which I don't know how to do) or get a copy and make sure you got a dock to hook up your deck to the TV. I don't know what kind of port the GameCube controllers use or if they'll work, though. I don't have one, so I couldn't tell you. I know the 3rd party wired pro controller I have works fantastically, though. Only other thing you gotta worry about it having enough ports to plug in to depending on the number of players and dock you got.
As for whether the game will be as smooth on Ryujinx as it is on switch, that's something I don't know considering I've never tried it on my deck.