.cfg and .rmp files locations

I’m trying to migrate my Retroarch overrides and remap files from Pixie to Goose.

I understand there are differences in how the 2 versions handle them, but I can’t seem to get it right using the muxzip archives.

Also I made a content folder override in Goose and it wasn’t included in a Config.muxzip backup archive. Is this normal?

I found this: Using RetroArch Overrides Correctly but it doens’t go into detail where to find, backup and restore them.

I there a comprehensive guide how to handle (backup and restore) overrides?

Thanks.