From your post:
“Therefore, the amount of equipment destroyed is significantly higher than recorded here.”
Illogical statement. No way of knowing that.
“No way of knowing that.”
Your statement is illogical.
Do you think every destroyed item has a photo of it?
Plus some destroyed equipment hasn’t been cataloged because it is unclear which side lost the equipment.
It is very probable that actual losses are significantly higher. These wrecks and captured units are in a privileged position, of a sort, of having fallen into the control of enemy forces, giving the Ukrainians the opportunity to photograph or video them. Since the Russians have, on the whole, been advancing, the Ukrainians have been unable to similarly document most of those that were left in areas of Russian control.
And then one has to assume that not every Ukrainian unit bothers to photograph every wreck. They normally have better things to do, there is a war on after all. Nor is there going to be an interested civilian with a cell phone along every country road.
Then there are those rather few units identified from targeting system video, most of which probably remain behind Russian lines, but that is a small subset of the evidence in this database.
So call it speculation, but it is informed speculation, the sort that intelligence analysts take seriously. Personally I’d put it that only half the actual losses ended up in this gallery of mug shots. That seems a safe assumption to me.