Use Checkpoint to dump your save data from your switch. Download the .nro file and place it in the "switch" folder of your modded switchs microsd card:
https://github.com/BernardoGiordano/Checkpoint/releases/tag/v3.11.0 or just download it from the Homebrew Store on your switch.
After dumping, mount your microsd card in some way to your PC and find the "Checkpoint" folder in the "switch" folder like so: /switch/Checkpoint/[titleid of game and name of game]/
In Ryubing Canary or whatever version of ryubing you're using since ryujinx is gone, right click your game and find "Open User Save Directory" and place your save files in there.