For the "Backup & Restore" feature, it seems you can backup but not restore / import settings? I'm curious about this mainly because I downloaded a premade save that had the PERFECT Home Region settings already done up, and wanted to basically, export/import to a different save.
I'm not 100% sure what you are asking, but I'll make a few assumptions and answer it best I can. For questions like this and troubleshooting, it's best to come onto the Discord and ask there.
Restore puts all of your settings back to the default state. Backup creates a separate file that keeps all your old settings in case you realize starting over wasn't what you wanted. There is no in-game interaction to import settings; you need to make the changes yourself or overwrite the settings file in your folder with another one. Home Regions settings apply to all save files, and are not tied to a specific save file, nor are those settings transferred when save files are shared. If the person who made the save wants to share their Home Regions save file as well, they are free to do that and you would then place it in your settings folder and overwrite your previous file.