This combination of materials in this small room is................a......not good. There doesn't appear to be a basis for the selection of wood-look tile and the metallic disco wallpaper. Selections for such a small room have to be made collectively or you will just add more and more onto the design pile you have created.

IMO don't compound the selections with a pendant light to jazz it up. Jazz you got. A good solution,.......not so much. : - )

For a small, utilitarian bathroom like this, I might have started with art as my inspiration and then made the additional selections based on that. You can likely select a dozen paint colors from the art. Any color would be successful in this room.

A tall narrow mirror that mimics the curves of your fixtures is the best solution I could arrive at for this space.

Due to the size of the vanity, you will probably need to get a custom mirror. When you do, think about getting a framed mirror. Adding a framed mirror will help add some spark and personality to your bathroom.

For such a small room and sink area I would use a mirror that filled the wall, and a surface mounted light fixture on the ceiling in place of the recessed light.

I think a plain classic mirror will do the job. there is a lot going on this bathroom as is. The walls are busy going down to a busy tile. I think its best at this point to keep things as simple as possible

I really like the idea of one large simple mirror. Once the mirror is in, it will reflect the light coming from your two recessed lights and make the room so much brighter. I wouldn’t bother changing one of them to a pendant.
I think your powder room looks clean and modern and that the wallpaper makes it look a little more fun.
Every room needs greenery to look finished...if you have floor space in a corner, add a tall pot of sansevieria. It will go with your modern vibe, but make the room feel fresh and less structured.