This article may help.

https://support.mozilla.org/en-US/kb/recover-user-data-missing-after-firefox-update

No, just the one profile. Opened Firefox on another computer synced to same account and before I could export the passwords it deleted them whilst I was watching!!!

I think I'm going to have to sit there tomorrow morning with phone in one hand and Firefox Lockwise and manually readd all my passwords back into Firefox. I can't find an option to export the passwords out of Lockwise.

I know Lockwise was deprecated, but I assumed that it would sync all the passwords back into the main Firefox account

You can install the About Sync extension to check what data is stored on the Sync server via the about:sync page provided by this extension.

• About Sync https://addons.mozilla.org/firefox/addon/about-sync/

Close and restart Firefox to access the about:sync page added by this extension (see the about:about page for possible about pages).

"passwords

556 records (541 deleted), modified Tue Dec 19 2023 23:06:25 GMT+0000 (Greenwich Mean Time)"

Clicking on the "Validation" option:

"missingIDs: 536 problems

There are 536 records without IDs."

Can you download all those records including the deleted ones in case you can repair/recover them ?