It seems like every other day there's a new Notion-backed website. I've started to compile a list of them and put them in a blogpost that I've reproduced below for convenience. Please feel free to add yours below. 🙂
Btw, each of the above brands their site with a custom domain. Any one of the following tools can do this for you: Super.so, Fruition, Host Notion, Notion2Site, Pageably!