Installing a toilet after a skim coat of plaster?

It's generally recommended to wait for the plaster to fully dry and cure before proceeding with any activities that may generate dust, vibrations, or potential damage. Installing a toilet involves some drilling and movement, which could disrupt the freshly applied skim coat. Taking the extra time to ensure the plaster is fully set can save you from potential issues down the road.

You can if you r not going to tails the wall but you can’t paint in till is fully dried

You can but you need to be careful as there might still be wet patches

Yes it's fine to do this, just make sure it's fully dried before any painting

You can but you have to be careful.