SOA Queries

[gyCfjSnO]

Could someone please kindly explain what these SOA Queries are that show in my AdGuard Home logs?

Time
22:20:08.351
Date
01/08/2021
Status
Processed
Type
SOA
Protocol
Plain DNS
Response details
Elapsed
0.13 ms
Response
SOA: a.root-servers.net. nstld.verisign-grs.com. 2021073100 1800 900 604800 86400 (ttl=4739)
Response code
NOERROR
Client details
IP address
192.168.0.1
Name
_gateway
Validated with DNSSEC

[Disqu3-mirOir-qt]

https://www.cloudflare.com/learning/dns/dns-records/dns-soa-record/

[gyCfjSnO]

Why do I get so many of these blank SOA records?