Yes, if you configured correctly your stall market with items and stuff, it should stay there, in your admin section, even that for some reason the notes are not broadcast over nostr.

Maybe you did the stall with another user? be careful with multiple users. As I suggest in the guide, use the super-admin to configure the extensions, then create a main admin, with which you configure the stall etc and manage it, then from there create several other users (managed by that admin user) for other stuff you need LNbits.