So far we we have 227 and Welcome Back Kotter.

https://epguides.com/227/
https://epguides.com/WelcomeBackKotter/ (pilot looks first but note the air dates)

Any others?

I think That Girl has what you're looking for. Marlo Thomas breaks the fourth wall at the end of the episode and says they're airing out of sequence:

https://youtu.be/mmVKrM_OtBg?si=GFtTuXoeG92bXP59

The Hazel pilot is shown as the 23rd episode of the first season. Don DeFore was edited in as the male lead, replacing the original actor. The sets are also different.

I think That Girl has what you're looking for. Marlo Thomas breaks the fourth wall at the end of the episode and says they're airing out of sequence:

https://youtu.be/mmVKrM_OtBg?si=GFtTuXoeG92bXP59

Gives me an idea for another thread.

The pilot episode of Good Times, "Getting Up the Rent", aired two weeks after its first aired episode, "Too Old Blues".

Clerks (https://en.wikipedia.org/wiki/Clerks:_The_Animated_Series).