My guess is that this was Carano's vehicle as originally envisioned, and when they cut ties with her, it threw development into limbo. They spitballed a bit about what to do, but eventually just said "Meh. We don't need it" and moved on.
Which is honestly fine, considering I think it's the same production team across the board for these shows. Three big shows (Mandalorian, Fett, Ahsoka) is a fairly big stable to manage, especially given the level at which these shows are made. Having one fewer ball in the air with Rangers' cancellation is probably a good thing overall.