It'll just work and sync everything as long as your Garmin account is synced to Strava.If you do manual uploads then you continue to do that but I don't think you do that.

Hey N1Chef,

First off thank you for sharing & joining our community.
As mentioned, just make sure your Strava account is connected and you will be good to go!
Check out our Athlete Knowledge Base section for more information on getting your activities to Strava.

Thank you!

I agree with @VikK . Strava doesn't know where you are so just keep doing what you do and get those miles in. Also don't forget to check your heatmap of NZ to see your overall exploration footprint.