Neither domain is currently using Cloudflare nameservers (seemingly the registrar changed them), which is why they were either never active on Cloudflare or disabled and subsequently dropped. You need to set them up from scratch.
Oi Sandro, eu adicionei os domínios certinho na Cloudflare e depois de vários dias eles desapareceram sem eu ter excluido eles, será que alguém entrou na minha conta e fez isso? Como eu poderia me proteger para que não haja esse tipo de problema?
You can check your audit log, but the domains will have been dropped because they don’t point to Cloudflare. If you have concerns about your account security, you can check out Secure compromised account · Cloudflare Fundamentals docs