I've used GripIt fixings in plasterboard for all sorts - work well and various sizes and load ratings available. Make sure you have the right drill size though - https://www.screwfix.com/p/gripit-plasterboard-fixing-25-x-205mm-25-pack/630hp
Conversely, I’ve used these a few times and hated them. YMMV
@Soul started
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I've used GripIt fixings in plasterboard for all sorts - work well and various sizes and load ratings available. Make sure you have the right drill size though - https://www.screwfix.com/p/gripit-plasterboard-fixing-25-x-205mm-25-pack/630hp