Welcome to Vodafone Community
Was trying to complete the 'Unlock your Phone' page - but there is no option for Google phones in the drop-down list.
Does that mean the Vodafone do not lock the Pixel phones?
More specifically I am interested in unlocking a Pixel 4 XL.
I don't have a 3rd party SIM to check with at this point.
The first thing to do is to try a alternative SIM in the phone, this will be the only way to know if the phone is locked. Pixel phones are pure Android and Vodafone are unable to add their own software.
According to Google, Pixel phones are manufactured by HTC, and you need to select HTC from the dropdown menu.
Also further information from device guides here: Vodafone Device Guides Pixel 4XL