There’s still time!!! Get Yuzu and Citra on Flathub now if you don’t already have it!!!
https://flathub.org/apps/org.citra_emu.citra
https://flathub.org/apps/org.yuzu_emu.yuzu
Just a note: Yuzu’s latest build is mainline-0-1734. The latest build of Yuzu on Flathub is mainline-0-1733.
flatpak create-usb /path/to/save/data org.yuzu_emu.yuza
See https://linuxconfig.org/flatpak-offline-repository-usage for details.