What should I use over a water based polyurethane stain to make my project shiny and smooth?

I am working on a project made of African mahogany. It’s a wall mount for our guitars that will stay indoors. I have a water based polyurethane stain. I’m going for a darker stain. I’ve put a layer on my test piece and it’s a nice color and spreads on well but it has no shine. From what I understand, more layers with high grit sanding will get some shine, but I should also add a layer of wax, oil, or varnish. I’m having a lot of trouble deciding what to get for the final layer! Advice would be appreciated.