I’m having the same issue for weeks. Reported here: [BUG] Missing images upon sync?
Below the note in iPadOS:
In MacOS, all the images are showing.
Later I edited the note in MacOS which made the images to show up in the iPadOS version as well. So no lost data. But I did lost some images due to this bug last week. That was my first and only data loss so far (it really hurts!).
This note was not imported from Bear 1.