https://www.techradar.com/news/these-are-the-htc-phones-getting-a-slice-of-android-9-pie

Now that Google has officially unveiled, pushed out, and named Android 9 Pie, the only remaining question is when your handset is going to get it – and for HTC owners, we now have a bit more clarity on which phones are in and which phones are out of the Pie party.

Via a tweet from the official HTC account, the company has confirmed that the HTC U12 Plus, the HTC U11 Plus, the HTC U11 and the HTC U11 Life are all in line for the software upgrade. That's basically all the top-end phones that HTC has released over the course of this year and last year.