Sorry I’m giving too much information.
For Namecheap, you just need to enable DNSSEC (on/off). Namecheap should automatically manage the corresponding DNSSEC records (RRSIG, DS, DNSKEY, etc.).
Then update your DNS TXT record:
ENS1 dnsname.ens.eth 0xcc9506Fa9c23f5f00fC6305374072862cAd57B3e
And resolve pmbug.com in ENS.