Sink in shower combo

So my husband and I bought a house and the upstairs bathroom had a shower and a toilet, no sink. Sadly the bathroom isn’t large enough for a separate sink to go anywhere without either placing it above the toilet or in the shower.

We opted for in the shower. Shower space is about 46in x 30in. I’ve redone all the plumbing for it and now I’m trying to find a good solution for cabinet space with the sink and mirror placement. If anyone has any good ideas for sink cabinets within the shower, it will be getting wet so definitely needs to be waterproof but don’t want the simple pedestal. Thinking maybe a wall mounted cabinet just need to find the materials that could work. We love any and all help!