It would be very helpful to know when the snap was created and updated.
you can see when it was created/updated on the server using:
snap info <snapame> |grep refreshed
to see when it was refreshed locally you can check the action log with snap changes
Doesn’t work for freecad for instance so that info is unfortunately not mandatory.
I think it became mandatory from a certain point on, i guess the freecad upload pre-dates that …