Chandrayaan 3 landed at around 69 degrees south latitude which isn't far enough south to access the permanently shadowed craters where large ice deposits might occur (and the Pragyan rover uses solar panels for power).
I haven't read specific reasons for choosing that site, but we have never landed that far south, and it will be interesting to see what differences (if any) there are from the more central latitudes, which is a good enough reason on its own.
It may be due to communications problems if a lander came down in one of those shadowed craters. We would not be able to communicate with it. it would probably require relay satellites around the moon to mediate that communication.
I haven't read specific reasons for choosing that site, but we have never landed that far south, and it will be interesting to see what differences (if any) there are from the more central latitudes, which is a good enough reason on its own.