This is a long-standing bug. It was reported to Wyze months ago.
If you search this forum, you will (sadly) find lots of problems with time-lapse recordings. For some users, they don’t appear in the album, just as you found. For others, they appear in the album but can’t be downloaded.
I had noticed some people posting about a similar problem, but many of those posts seemed to be rather old and no clear solution was posted, so I was hoping the issue was resolved with a firmware update or something. I guess I was wrong.
Oddly enough, my time lapse videos have shown up in my album and are now viewable - it just took several hours after the end time of each of them before they appeared.
Odd, but technically solved. I wish I had some useful information to pass on about how the issue was resolved, but unfortunately I do not have any.