Currently ArcPro (version 3.0.2) allows you to show vertices by holding the T key, but it only shows the vertices in a square box that you have to hover over a line. This is incredibly clunky/annoying to use while editing.
In ArcMap, you can hold the V key, and all vertices show up, sometimes they remain shown even after releasing the V key, allowing you to easily (and quickly) create features that snap to existing vertices.
Idea: Modify the T key in ArcPro to show all vertices of a feature, and better yet, keep the vertices shown until you hit the T key again.