How to sync the config in CLI when we have multiple traffic-group ( Active-Active)

You're confusing Traffic and Device Groups.

Config Sync is commanded by Device Groups, not Traffic Groups, so an Active/Active scenario doesn't necessarily mean there will be separate Config Sync.

You can have multiple Device Groups for config sync, either with separate devices (in a 2+ unit HA environment) or for separate modules (eg. set WAF to automatic sync ), but if you only have one device group for your HA units, the will also be only one configsync option available.

Command will be (v11 to v16)

run /cm config-sync <sync_direction> <sync_group> 

Where <sync_group> is your Device Group name (not traffic group!) and <sync_direction> will either be to-group or from-group depending on which unit will receive/push the configuration.