Some tips to check.
Server settings
NTP Server Enabled
/system ntp server
set broadcast=yes broadcast-addresses=192.168.88.255 enabled=yes manycast=no
In System - Clock set the Time Zone Name
Your firewall has to allow - UDP 123
Client settings
Client configuration is located in /system ntp client.
enabled (yes)
mode (One of broadcast, unicast, multicast or manycast.)
primary-ntp, secondary-ntp (IP address)
Video step by step
https://www.youtube.com/watch?v=d7iPobGwNUk
More Information
https://wiki.mikrotik.com/wiki/Manual:S ... r_settings