At home it is fixed on a plasterboard of 80 to 100 mm thick. It's more a question of screws and fixing system, you have to choose the right pads and screws.

Yes, but you have to put a reinforcement behind the plasterboard, the offset and the weight generated by the screen can be very important.

I think the bracket could be fixed to it, but I would not advise it with a relatively heavy TV. First of all, you need to find out how much weight your plasterboard wall can support.