iCloud Photos
In iCloud Photos on my MacBook (MacOS Big Sur), Photos has two options, one for Photos and one for Moments. They both show they have the same number of photos, but under Moments, they go back to 2002, and under Photos, they only go back to 2010. I cannot find the pictures older than 2010 when in the Photos option.
I am probably just doing something wrong, but cannot figure it out.
I did notice that the pictures are not necessarily in order by date.