HTC VP of Product Management Mo Versi confirmed that Android Oreo for Sprint HTC 10 units in US. The Oreo update rollo ut started on Feb, 12 as the carrier approved the update. Unlocked version in US has already received the Oreo update.
The update brings all the features available in Android Oreo. HTC 10 customers who are all on Verizon and T-Mobile has to wait for more than a month to receive the update.
To check the update manually head to settings-> About phone -> software update. IT will take couple of days for all the devices to receive the update.