Ns lookups do not work or kind of look strange?

dig github.com ns

  ; <<>> DiG 9.16.8 <<>> github.com ns
  ;; global options: +cmd
  ;; Got answer:
  ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8592
  ;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 1
  
  ;; OPT PSEUDOSECTION:
  ; EDNS: version: 0, flags:; udp: 1232
  ;; QUESTION SECTION:
  ;github.com.   IN NS
  
  ;; ANSWER SECTION:
  github.com.  46 IN NS dns1.p08.nsone.net.
  github.com.  46 IN NS dns2.p08.nsone.net.
  github.com.  46 IN NS dns3.p08.nsone.net.
  github.com.  46 IN NS dns4.p08.nsone.net.
  github.com.  46 IN NS ns-1283.awsdns-32.org.
  github.com.  46 IN NS ns-1707.awsdns-21.co.uk.
  github.com.  46 IN NS ns-421.awsdns-52.com.
  github.com.  46 IN NS ns-520.awsdns-01.net.

dog github.com ns

   Status: NXDomain
   A github.com.       31s   140.82.121.3
   SOA             23h58m44s A "a.root-servers.net." "nstld.verisign-grs.com." 2020110900 30m00s 15m00s 7d0h00m00s 1d0h00m00s