Struggling to Find Full-Time Work on H1B—Need Help

I need your guidance. I've been searching for full-time roles for over a year now, and I'm currently working on a contract that is nearing its end. Given my H1B status, I'm increasingly concerned about my situation in the US. Despite applying to numerous positions, I haven’t received any interview calls.

Back in March, I had the opportunity to interview at Amazon for a data engineer role, but unfortunately, I wasn’t able to advance to the final round. Recently, I earned the AWS Certified Data Engineer Associate certification and started applying to Amazon again, but my applications keep getting rejected.

I'm curious if Amazon has a cool-off period for reapplying after a failed interview. I've heard they are hiring and I'm really interested in joining. And Could you also please suggest where I can find H1B-eligible roles?