Emails and email forwarding

Brand new here. If I have an email called [email protected] with my previous hosting provider and I moved to a new hosting provider. Can I still use that email? The MX records will be deleted by the old hosting provider tomorrow.

Cloudflare will allow email forwarding, I set that up already. Can I use my old email like the image or can I only use forwarding?

If you have a new mailserver for the domain, you should use it in your MX records and have senders deliver mail directly there.

The email routing configuration you show in your screenshot cannot work since you have told it to forward email to itself. You need to send it to a mailbox at a different domain.