Nice to see this feature was added to 2.3 but it needs a way to manually set the vertex interval like in previous versions. As it stands now, the resulting digitized line is made up of an auto-incremented set of vertices that are dependent on the map frame current view scale. Successive vertices are also only generated at 90 or 45 degrees which is very limiting.
It also is very unstable and crashing the software if too many vertices are generated. No error message or or log is created, Pro just closes when trying to finish sketch or view vertices. Seems to be zoom level/scale dependent.