Ladies and Gentleman's
If somebody is interested here you can find link to OTA with Android Pie for HTC U11 2PZC10000 CID: HTC_034 EMEA ( Single Sim ) with OREO
Thx to Wire-Shark i was able to get direct link to this OTA and download it direct...
Pie for 2PZC10000 HTC_034 Emea ( Single sim ) is available. I'm installing now !!!!
You can try to perform this operation. Just change firmware version to version you are going to install and should be fine. Worked for me with this tool...