Sunset and sunrise is 1 hour out and auto time sync with gps gives me a wrong time zone

last week I purchased the fenix 7 sapphire solar

i am in Montenegro and syncing the time with its gps gives me Tunis gmt +1 and the Sunrise and sunset is about 1 hour out on the device 

I can manage to display the correct time when using the sync with phone option but the sunrise and sunset is still out by 1 hour

please help!