intentionally not, because installing additional software from 3rd parties on an IPFire machine is a bad thing in terms of security, and we do not want to encourage our users to do this.
There was a thread about NTS a few days ago, too.
Personally, I am highly interested in a secure replacement or enhancement for NTP, as long as it is standardised, distributed, and not relying on technologies we cannot ship or use everywhere, such as
swdate which unfortunately depends on Tor.
As @bonnietwin already mentioned, we would like to have development activity and questions on the development mailing list - looking forward to see you there.
Thanks, and best regards,