We have created AMP version of news pages for the site https://www.team-bhp.com. Most of the AMP pages are indexed by Google without any error but when a user searches on Google using mobile, Google is showing the actual desktop webpage instead of the corresponding AMP page.
Here's a specific example:
Desktop page: https://www.team-bhp.com/news/bajaj-chetak-rivaling-tvs-electric-scooter-spied
AMP page: https://www.team-bhp.com/news/bajaj-chetak-rivaling-tvs-electric-scooter-spied?amp
Google console shows that the desktop page has been indexed:
Clicking on AMP link shows that the AMP page is valid:
When I search for this page in Google via my cell phone's Chrome browser, I see the desktop page as search result. I don't see AMP page at all.
Any idea how can this be fixed?

