I am also having this problem. I am using the Evernote uploader on my desktop with a MacBook running the latest version of OSX, Mac OS 11.6. I am running Evernote desktop 10.22.3, The title of the notes (filename) is present, but none of the content or files are present. When I check the web version of Evernote, the content is not there either.
The product was running correctly early in the day on Saturday 10/2/2021, but in the afternoon, stopped running correctly and lost about 3 hours of note uploads.
I checked on it today (Sunday, 10/3/2021) and the product did not resume uploading or correct the missing file information. The web version also did not have the missing information.
_SyncLog.dat