I have my order in a group in Bookmarks with a name that works perfectly on PC but on mobile I have to go to file explorer and manually activate the custom file explorer order plugin because I get this error:
Custom sort File Explorer view problem - is it visible? Can’t apply custom sorting when the File Explorer was not displayed at least once.
No custom sorting spec, will go with implicit sorting (bookmarks-based).
Go to Settings > Community Plugins, press “Check for updates”, and update the plugin. The problem you’re seeing has been fixed. Custom sort does not work on mobile · Issue #193 · SebastianMC/obsidian-custom-sort · GitHub