I am only a solo user that tried similar recovery.
There are several jobs in the admin section, one of them is "migrate the storage template" or something like this. I think that thing might do what you want. I would check that it is set properly depending on what you were using previously and rerun in.
https://immich.app/docs/administration/storage-template/
I also wanted to mention that normally Immich dumps its own db into a file backup file somewhere. I forgot where. Check the database dump backup cron job in the settings.
I am only a solo user that tried similar recovery.
There are several jobs in the admin section, one of them is "migrate the storage template" or something like this. I think that thing might do what you want. I would check that it is set properly depending on what you were using previously and rerun in. https://immich.app/docs/administration/storage-template/
I also wanted to mention that normally Immich dumps its own db into a file backup file somewhere. I forgot where. Check the database dump backup cron job in the settings.