refinishing brazilian cherry

Hi and Thanks in advance for suggestions

I have brazilian cherry floors with water based finish currently. The flooring people are sanding them right now. I am planning on staining them espresso or brown possibly with loba whitener added. Followed by 3 coats of loba supra at

questions(sorry if dumb) do I need a sealer? should i do sone kind of uv protectant coat? is Loba invisible protect an option on brazilian cherry?