Waht bathroom is this a full one or a powder room? I never use a hand towel in a PR only disposibles so a nice lucite box filled with towels one use only. I have done this long before Covid and will awya make thta choice in a space where many use the bathroom. If this is in a main bath or primary suite a nice hook instead of abar can work nicely in a tiny space As for the mirror I have no idea of any surrounding space and not even sure why you chose ORB for the faucet.

If you can purchase the correct sized arched mirror for the space, that should work. No to the towel bar. This looks like a powder room. Just placed a guest towel on a hook next the sink.

What about an oval?

An interesting rectangle ?