The save file is compressed on switch. You should be able to google search the name of the program. It will decompress the switch files and then you can just place them where the PC saves go.
But it’s only useful if you plan to switch to of permanently.
The main problem is that the PC version is ahead of phones and switch. So a newer save file cannot be put onto an older version of the game.
My wife have a 400 hour file on the switch and wants to play the newer updates, but doesn't want to play on a laptop. So, she is kinda stuck waiting to play the update.