See the list of servers returned for pool.ntp.org from 9.9.9.9, and the number of times, when queried from Singapore over the last few minutes:
4 IPv4 Address: 172.104.44.120
9 IPv4 Address: 139.162.96.56
10 IPv4 Address: 119.28.230.190
17 IPv4 Address: 209.58.185.100
22 IPv4 Address: 47.241.41.246
23 IPv4 Address: 144.126.242.176
26 IPv4 Address: 133.243.238.163
29 IPv4 Address: 129.250.35.250
31 IPv4 Address: 167.172.70.21
34 IPv4 Address: 94.237.79.110
36 IPv4 Address: 203.123.48.1
37 IPv4 Address: 133.243.238.243
51 IPv4 Address: 129.250.35.251
51 IPv4 Address: 45.125.1.20
52 IPv4 Address: 167.71.195.165
78 IPv4 Address: 61.239.100.17
180 IPv4 Address: 23.106.249.200
382 IPv4 Address: 52.148.114.188
515 IPv4 Address: 162.159.200.1
529 IPv4 Address: 162.159.200.123
Doesn’t look like the world to me. Even with the short sample period, “the world” should have more servers than that.
Will run the test overnight, let’s see tomorrow if there are significantly more servers in that list.