Do you know the weight rating of the unit itself? A lot of times they have a maximum weight limit, and then it should tell you a per shelf limit (since that particle board/wood can only hold so much).

From there it should be easy to tell if a fully stocked 10 gallon would work on multiple shelves.

I’d check to make sure that the manufacturer has a weight listed per each shelf, since the whole unit may be able to hold that weight but each shelf can’t hold enough for a decent sized tank.

Yeah, you need the per-shelf capacity.