1password 7 - Vault Restore through iPhone local backup?

Hi,

I have been on 1Password 7 until recently and joined the 14-day trial by setting up a 1password account after I realized that there no longer any iCloud syncing across devices.

I did not realize that the consequence of this 14-day trial was that I would not be able to add any new password to my vault without continuing with the subscription...

Long story short:
- I thought that signing out of the my.1password.com account would allow me to add passwords again (even if they would not sync) - turns out, it does not...
- I stupidly restored a 4 year old vault from my Dropbox (and I don't seem to have a more recent one there)
- I do not remember my Master Password for my my.1password.com account. So I cannot access my current version any more.
- However, I DO know my app-password. So I can access the app...

As a result: I lost all of the additions to my vault since 2020...

HOWEVER: I do have a full local iPhone backup in iTunes from a few months ago (before I did the 14 day trial of 1password)
QUESTION: If I were to restore that local iPhone backup from a few months ago, will it restore the vault in the 1password 7 app from that local backup - so I at least have a version from a few months and not 5 years ago? This means I could just use the app-password to get into the app.

I would probably do a current backup before restoring that one, then sort out the backup of my slightly outdated vault and then go back to the "current backup"...

Thank you so much for your insights!