In the v10 release notes on my 2014 S60 without AP, it said HomeLink could be used from v3.10.0 of the app. I have that version and like many others here, the option doesn't appear in the app.
I had been thinking about that feature months before I found out about it in the release notes. I moved into a rental house earlier in the year and my mower (Ryobi electric rider) shares the garage with my car. I take it out the back manual garage and drop the door down so I'm not throwing stuff at my car. The thought occasionally crosses my mind that if that garage ever got stuck and I couldn't open it back up, I wouldn't have a way in unless I remembered to unlock a door or take the house key. The landlord kept the garage opener after I programmed the car and I haven't bothered to ask him for it since I haven't actually needed it.
Being able to open the garage from my phone would be the perfect backup since I always have my phone on me anyway. Another potential use may be to let guests in when I can't immediately get to the door. Most likely, I'd just be showing it off as I do with so many of the other features.