For a long time most of Linux distribution uses ntpd as a deamon for time sync with ntp server. NTP client was well know by the OS administrators. But with a lot of limitations. Newest SuSE (RH and other) distributions comes with chrony software. Chrony seems to be the successor of old ntpd. If you are intereting, what has changed a good comparison you can find in the followin article: https://chrony.tuxfamily.org/comparison.html

Chrony in SuSE/openSuSE distro can be configured via yast ntp-client module.

As root run yast, and set startup the services during boot:

Additionally you can set the Synchronization Servers. Also when adding time servers you can check if they are available and working properly (test button)

After configuration you can operate and check the current time sync status by using command chronyc.

Chronyc provides the following (most self explanatory) options:

One of the most common option is chronyc sources, which will display the current state.

For more details you can follow the chrony site documentation https://chrony.tuxfamily.org/documentation.html or simply manual.