Default TTL Values of OS:
https://ostechnix.com/identify-operating-system-ttl-ping/
To view the scan status, we can press the [Space Bar] during the scan, which will cause Nmap to show us the scan status.
nmap -sA -p 53 -sVU --mtu 16 --scan-delay 2s --max-retries 2 -T1 10.129.231.254 --reason -Pn -n --packet-trace -D RND:10