Changing domain names for my two websites

Both websites point to Cloudflare through nameservers change.

I want to change the domains for both websites. I presume I need to change that via Cloudflare-DNS manager, right?

I want:

alarme-maison.ca website to become protechsystems.solutions

ssl-inc.ca website to become alarme-maison.ca

Thanks for any advice on how to do this.

You can accomplish that with page rules.

Wouldn’t it be similar to Domain Forwarding? Google Ads does not access Domain Forwarding, not sure about Domain Redirects.