Your banned dude, I bet you just cleared cookies and tried a new browser or something? You need to cover EVERY footprint that facebook can have of your system. (basically you can't use that system and ip, device id again, till they are changed and reset)
your IP or hardware fingerprint is blacklisted by meta. To fix this, use an anti-detect browser (like AdsPower or Multilogin) with clean static residential proxies, create separate browser profiles, and warm up new accounts gradually for a few days before taking heavy actions
in case several accounts become deactivated on one particular device i would think that this is due to some common security trust signal and not due to the poor fortune of all of them separately.i would refrain from creating additional accounts for now and look for any security warnings delete suspicious applications or browser extensions nd use official procedures for recovering aplying for appeal.
