Reddit mentions of Bluelans Over Kitchen Cabinet Door Tea Hand Towel Rail Rack Holder Hanger Storage - 23cm

Love all these suggestions, I would just add a couple ideas:

Remove the hand towel bar on the vanity and replace with an over-the-door bar like this.

Replace the outlet with an all black one. The color contrast attracts my eyes there before anything else. If you can, I would even charge the brushes in the bedroom to hide those cords. Surely they don't need to be charged after every use, just stick them on the charger every few days.

You have limited floor space, either get a wall-mounted toilet paper holder or at least get one that holds backup rolls also seeing as there is limited storage as well.

Switch out the cabinet above the toilet with some shelves. That dark cabinet makes the space feel even smaller and shelves will give you the same storage space.

I had towel bars behind the door before and I hated them. Got the idea from a Martha Stewart guide and thought it was genius until I did it. I would suggest getting a towel rack to store your towels and if you're tall enough you can mount it above the door. This is what I have in mind. Just to store clean towels. Then get the normal towel hooks that go on the back of the door to dry towels.

All these small things I feel will get you the most out of your space.