Hello; I have a stand similar to the one pictured. Similar in that it also has round stock for the legs. I find my stand to not be as stable ( more prone to racking) as my metal stands made from all angle iron. I notice this racking movement more when using a magnet cleaner to scrape algae off the glass. That said the stand might hold a tank on the lower shelf. In fact a lower tank will lower the center of gravity a bit and may make the stand more stable.
Now for a couple of comments from what I see in the photo. First is the point here the legs rest on the carpet. Seems likely to me the legs will make places in the carpet and those places may be permanent. Not sure if a practice of mine will help, but I some times place small cat food cans under the iron legs of stands. I do this for two reasons.
One is to spread the load out a bit so the legs do not make dents in my vinyl flooring. Not sue yet how well this will work as I have not moved a tank since sitting it up that way, but have had metal legs make dents in a lineloeum floor.
The other thing is that the tank is on carpet. I have had bad outcomes from this practice and no longer will put a tank on carpet at all. I went to the trouble to remove all wall to wall carpet fromm the area where my tanks sit because of the problems.
The more serious issue has been that water gets either spilled or a tank leaks. The water gets under the carpet and more to the point under the carpet pad . Once there the water stays a long time and can cause mold to grow. The other thing is being wet over time causes damage unless the floor is a cement slab.
I get that you do not plan to spill any water nor have any leaks, but I always spill some and have had tank leak. If you own the place then it is one thing but if you rent you may accumulate an expensive repair bill.
Looks like the stand may hold a small tank on the lower shelf. No gurantees however as making such a judgment from only a picture is iffy at best.