ᐅ Junctions Between Gypsum Boards and Gypsum Walls: How to Prevent Cracks

Hello,
during the bathroom renovation, part of the drywall was removed. The new solid gypsum boards (20 mm (0.8 inches)) were installed, and a flexible tape was applied between the drywall and the boards (see photos).

The new tiles will be laid on the boards, the drywall will be skim coated, and treated with a textured plaster. Now the question is how to prevent possible cracks in the textured plaster. Would it help to apply a mesh or mesh corner bead to reinforce the joint?
Thank you.

Somehow, I can’t follow your explanation. What exactly will be tiled, and what will only be covered with textured paint? The drywall boards are already skim-coated, as you can see. The correct joint compound has been used (the green one). Why do the drywall boards protrude by a few millimeters from this reveal?

The white wall used to be larger but was shortened. Since the new tiles will be installed directly on the drywall panels, the wall had to be aligned with the back of the panels.
Now the question is how to create a good joint here so that this 3–7 mm (0.12–0.28 inch) gap remains flexible and no cracks can form at this point when the textured roll-on plaster is applied.
The roll-on plaster will, of course, be applied to the white wall.
The idea is to use corner mesh tape at the joint between the wall and the panels and to reinforce the gap as well as the roll-on plaster as effectively as possible.
I assume that the panels will always move slightly, the drywall wall will stay fixed, and that this could cause cracking at the joint in the future...

I have done some research and found Rigips AquaBead Flex. It is a tape (85 mm (3.3 inches) wide) that can be used as edge protection. The tape is flexible and hopefully will absorb the stresses when the drywall panels move. I would fill the joint itself (under the tape) with green joint compound. A flexible tape is already installed in the joint.