The U Play is a budget model from 2017. These normally get no more than 1 year's software updates, and MTK-based models like this tend to be particularly poorly supported by HTC.
Also with their recent cuts HTC have vastly reduced software support, so even flagships are getting very little in the way of updates. So all in all I very much doubt there is an update for this phone, and for sure HTC aren't going to release one now if they haven't already.