Can a toilet make two toilets

Of course, you can, but you should make a reasonable layout according to the area, and it is best to make a partition with cloth glass, not too high. If the design is not good, it will be ugly and look like a public toilet.

Yes, but if it is a building, the toilet drain should be drilled in the floor slab, and the residents below you may not agree and have to negotiate.

If that doesn't work, you can only cover the sewer pipes on your floor platform.

Hope it helps.

There are no technical problems, only environmental constraints. Communication is hard.

If you have money, you can do as much as you want.