Did you create the Cloudflare account? If so, account recovery steps are here…
If it was not set up by you, it will have been done by someone who has access your registrar account (Omnis). Maybe a developer or other person working on your site.
Your site was added to Cloudflare on 2024-01-16 according to securitytrails.com so maybe that will help you remember who may have set this up for you.
If you can’t get access or find out, you will need to take control of your DNS by changing the nameservers at your registrar to those for a new Cloudflare account or other DNS provider.