I see a much bigger problem here. The assigned nameservers in your screenshot do not match the nameservers being returned by DNS. They do match the ones shown in your whois, but the ones in the parent zone and Cloudflare are those below.
It looks like your domain is not yet active in this account so any changes you make to your DNS in your Cloudflare account will not propagate. You are still on step 1 of 3 of set up where you need to select a plan.
In your Cloudflare dashboard you’ll notice your domain shows Set Up rather than Active. Click on your domain and follow the steps there. The last step will be changing nameservers. Once the domain shows Active let us know if you are still experiencing the issue.
Alternatively, I do see this domain active on a different Cloudflare account. The DNS records will either need to be changed in that account, or you will need to finish the set up process to move it to your account.