Starlink isn't sending many satellites into the polar orbits because there are basically no customer there to make the extra cost worth it. To make the whole network cover the poles you'd need even more satellites to cover the tiny fraction of additional customer it would bring.
Also until recently there wasn't a way to downlink from polar sats even if they were lofted. Most Starlink data is immediately downlinked instead of being sent to neighboring satellites so you need a downlink relatively close to the customer which isn't possible on the poles.
Now with the intra=constellation lasers online, though I think they're still around 50% of satellites only, it could in theory be done but the required extra birds makes it really tough economically.
Also until recently there wasn't a way to downlink from polar sats even if they were lofted. Most Starlink data is immediately downlinked instead of being sent to neighboring satellites so you need a downlink relatively close to the customer which isn't possible on the poles.
Now with the intra=constellation lasers online, though I think they're still around 50% of satellites only, it could in theory be done but the required extra birds makes it really tough economically.