Ready mix stucco would work for that.

Maybe prep the concrete with liquid concrete adhesive to improve the adhesion.

You only need thin layer so no mesh is required.

However if you want to make it more humidity resistant apply mesh with humidity barrier. They come already made for that, that would also improve the stucco adhesion.

Ready mix stucco would work for that.

Maybe prep the concrete with liquid concrete adhesive to improve the adhesion.

You only need thin layer so no mesh is required.

However if you want to make it more humidity resistant apply mesh with humidity barrier. They come already made for that, that would also improve the stucco adhesion and reduce cracking.

Best result would be to use 3 layers of stucco. Use scratch layer before applying the brown coat. The final layer can be a pigment or color.

If you are not into applying stucco, consider backer-boards. (best solution for tiles in bathrooms floors and walls.

Just screw then on the wall then cover the surface with what suits you. Backer-boards are moisture resistant, will not crack or bend. It will cost you more, but it is less work and the surface will be even.