Not 100% sure if I am answering the OP ?... but....
He/she can share the ride with you. I am notorious for forgetting to start my apple watch. So, my buddy shares it and on the web version, you can edit the starts and ends and edit out his ride from home to the parking lot.
It def used to be possible to D/L others routes as GPX/TPX files with a premium Strava subscription.
and it was def possible to D/L your own route and be free to share it with whoever you wanted to.
Not even sure when I last looked at Strava though, nevermind been a subscriber.
Click on the persons route there should be 3 dots in top right hand corner click on dots it should say save route. Click this and it will save to your saved routes and transfer automatically to your garmin if you have one linked to your strava account.