system
Given the following post, respond as if you're commenting on Reddit:
human
Why are there no Jedi helping the rebel alliance fight against the Death Stars/Empire?

to my knowledge skywalker was the only Jedi (even then he wasn't a fully trained Jedi to help fight against the Death Stars/ Empire, at alongside the rebel themselves

Why? Would exiled jedi not be able to find out about this rebel alliance and help out? Other pilots or strategists or even fighting on the ground at Endor would have been of at least some help

I understand they are on the run and any of the few still alive are in hiding, so their communication would be very limited but they are trained to be resourceful and we see in the films that they can adapt quickly to situations (not the council maybe).
gpt
Darth Vader hunted down Jedi after he turned. The only surviving Jedi were Obi-Wan and Yoda. There are differing opinions on why they survived while others did not.

Some say that they had the ability to "force stealth", hide their signature. When Obi-Wan went on the first death star Vader almost immediately picked up on his presence. Perhaps he could hide from him from light years away, but not miles.

Some think that there is a level of canceling on the planets that they hid on. Yoda was on Dagobah, where the evil cave that Luke visited was. There is evidence that the cave is where a dark jedi who came to kill Yoda died. This evil stayed on the planet, and Yoda made his camp there because he would be hidden by that signature.

Obi-Wan may have chosen Tatooine both because that is where Luke's Aunt and Uncle were (and he was to watch over him), and it held a personal pain for Vader. This pain would 1) Make him less likely to visit and 2) Make him blind to any force activity there.