Nameserver Propagation issue even after 9 day

What is the name of the domain?

datapiggy.com

What is the issue you’re encountering

I have changed nameservers more than 9 days ago, but cloudflare is unable to detect them. Whois records shows the change as well.

What steps have you taken to resolve the issue?

Activation checks on cf

You have a DNSSEC issue…
https://cf.sjr.dev/tools/check?9dd75e7f9da946d6afff63ccef447319#dns

You need to either disable DNSSEC at your registrar, or enable it at Cloudflare and copy the DS records to your registrar from your dashboard here…
https://dash.cloudflare.com/?to=/:account/:zone/dns/settings