tl;dr: Go to https://www.jobs.now/ and apply for jobs. Even if you aren't actually planning to get them. The number of applicants who apply adjusts the "Labor Market Test" and forces them to withdraw the H1B hire.
Long reasoning: https://www.jobs.now/blog/unveiling-the-truth-about-h-1b-visas
X account: https://x.com/JobsNowPR
Every job you apply for takes back an American job
DO YOUR PART!
I was offered a developer job by someone in my company. It would have been $30k increase in pay (which I really could use). I knew the people on the team and they were excited to have me. I didn't hear back again from that manager for a couple of weeks so I asked my friend who knows that group what happened and he said the manager was ordered to hire two Indians instead of me.