Scarlet and Violet barely worked on emulators and Nintendo ever since then shut down every Switch emulator project. Mario & Luigi Brothership was a broken and glitchy mess on emulators and there's no doubt in my mind this will run even worse now, almost a year later then.
In a couple of months there will probably a fork of some emulator that will be able to run Legends Z-A and that's also only if Nintendo/Gamfreak doesn't shut this down as well and it still won't run as good as on the Switch hanheld. Tough luck, maybe this is the reason the XCI hasn't leaked, no one is able to get it to run.