Transfer Heroic setup to new steam deck

Hello, i've searched a bit but haven't found a definitive answer : i would like to transfer all my epic & gog games from a deck (og) to another (oled)

I have a lot of config that i would like to preserve : prefixes tweaks, cloud saves or syncthing folders when not available, etc...
And I don't want to open them to swap internal SSDs.

All the games and prefixes are already on a SD card, that the new deck will use.

Is there a chance that copying a few files/folders from Heroic handle that without too much trouble ?
Which folder(s) would that be ?
Thx.
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