For the notifications issue, you can follow these steps :
Activate the notification access authorization on your smartphone: Settings - Additional settings - Privacy - Specific application access - Access to notifications. Activate the Watch Plugin (if it was already activated, deactivate it and then reactivate it).
Activate the automatic start authorization on your smartphone: Security - Manage applications (Galaxy Wearable, Watch Plugin, Samsung Accessory Service) - Authorizations - Activate automatic start.
Ignore battery-related limitations on your smartphone: Settings - Manage apps (Galaxy Wearable, Watch Plugin, Samsung Accessory Service) - Set battery saver to No limitation.
hi i am having problem with my mi ultra 11 pairing samsung watch 4. already downloaded galaxy wearable + galaxy watch 4 plugin but it cant detect galaxy watch 4 plugin. pls help.