Hello Lucas Resende,
Thanks for your question.
If you do not have access to the old phone, for work/school accounts will you will need to contact the administrators to help u re-register/reset those account.
For other accounts you will need to reach out to the accounts support as they can help you re-register MFA.
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola