I lost a year of notes. Very important stuff. My ectopic brain and memory.

I have tried all the tricks suggested. there is no recently deleted folder. Nothing on other devices. just gone. There one day, gone the next startup. 27" iMac 2017 4.2 GHz Quad-Core Intel Core i7 with 64gb ram, running Ventura 13.5.2. At a loss. Now I cannot use Notes. If it does that with no rhyme or reason, it is completely unreliable, and a data loss threat.