Know of many Meta contractor to full time converts. If things are going well your manager will support you in the process because it helps with continuity on the team/project. In fact, know of cases where manager provides the interview questions beforehand to contractor.
These Meta contract roles are 12 months, do they extend, or their a cool-off period?
How do you get contract job at meta
The minute recruiter finds out you are currently a contractor at Meta they move on. Idea is not to create a gap on the project or program you are supporting. If it's in the same program or team and managers blessing then yes would be easier.