Random photos have vanished from Lightroom, are not in deleted photos, or online, or on desktop

Using Lightroom V9.0 for Android. I had a series of photos open yesterday and edited them, and today, they have completely disappeared from my Lr catalog. They were in a folder of 22 images and now there are only 12 images in it. I opened Lr on Desktop to see if they were still there. When it opened, it said "22 images" and then moments later when it sync'd, the photos were gone too, and it was showing the album as "12 images."

The photos are not in Deleted on Lr Mobile, Lr Desktop or Lr Web. They are simply gone without a trace, along with their edits. They are not in All Photos. They are not in the matched collection in Lightroom Classic.

When I go to the original file in Lightroom Classic through the Files section of my catalog, it shows in the History that it was "synced from Lightroom mobile" but it's not in the collection it should be in, it's not in All Photos, and it's not showing the edits that I did yesterday.

Any ideas how to get these photos back, where they went, and why? I talked to support. They were not helpful. They copy-pasted comments from posts in this forum that I had already read which didn't address what has happened to my photos and was about Lightroom Classic, not Lightroom.