Dear Joe,
If you are correct, then I think that the NTP daemon ought to be enabled as part of the initial installation.
When I looked up systemd-timesyncd in the systemd-manager, it showed a message that there was a conflict with NTP. So I have disabled NTP in favor of systemd-timesyncd as well as systemd-time-wait-sync.
I can only say that, so far, these two programs have kept my computer almost exactly (within one second) on time.
I have to mention that EndeavourOS is the very first GNU/Linux distribution I have tried (and I have tried over twenty of them) that did not automatically, “out of the box,” keep the computer’s time synchronized with NIST (in the United States).
I think that this might be something you and the other developers ought to look at when you have the time. (Just a suggestion.)
However, though it was initially confusing, it turned out to be fairly easy to correct the situation. I have used the following commands:
yay -S systemd-manager (in case you don’t already have it installed)
sudo systemctl enable --now systemd-timesyncd.service
sudo systemctl enable --now systemd-time-wait-sync.service
This has taken care of it all and I now have those two systemd modules activated on all of my EndeavourOS computers. All of them are now synchronized with NIST.
Of course only time (no pun intended) will tell as to whether the computers will remain synchronized with the NIST atomic clock.
Lawrence