Right now the FCC has an official comment period open, until MAY 30. I have no idea if it will help for them to receive many letters from the general public, but we've written up instructions on how to do this here: https://www.kesslerrebellion.com/take-action
You can submit a comment even if you don't live in the US.
I know there are SO many things to fight against right now. But if you have any energy left, and you love the night sky, this is a relatively easy action. Thank you!