Question about facebook ad pixel

Last 30 days i have spent $12k on advertising, and my ads look dying right now, I tried to promote new product same niche but when in ad targeting the audience that i selected for new campaign had decreased from 10 millions to 30k-100k

I think all happened because of facebook don't want ads target to same people

Happened to all audiences i targeted for first product

How do i reset the audience without tick on expand audience box?

ANyone? Or should i create a new pixel?

Maybe you can ask here - https://www.blackhatworld.com/seo/ask-me-anything-about-facebook-ads-2020.1222118/

Thanks i just paste the question on the thread mentioned

Is it a physical product? If so, then check your customer feedback score, maybe it's low so that could explain the reach.

Is your problem resolved OP?