99% of my gmail notes vanished overnight

How do I recover my notes? I had quotes, research topics, passwords for various accounts, snippets of conversation for my book--I need these notes back, and am trying not to panic because I don't even remember what all I had.

I've checked app settings; didn't help.

I do not have a "recently deleted" folder.

The last time I changed something on my phone was deleting some things in the mail app a couple days ago, but I'd like to think that wouldn't affect the notes.

Pretty sure I accessed these my notes in the past week.

The only note that's left is one from July of last year; no idea why it's the only one left.

No one else has access to my phone, and I don't leave it where others can play with it without my knowing.

Phone is password and face ID protected, so I doubt one of the cats were able to do anything overnight.