https://wccftech.com/google-pixel-2-unlock-bootloaders/

Looks like there is no end to Pixel 2’s software issues. Just when we thought that the newly launched devices have had their share of lags, here comes another issue.

Turns out that the Pixel 2 units that were purchased from Play Store and not from any reseller, are arriving with bootloaders that cannot be unlocked. The issue was first reported on XDA Developers forum, where several users ranted about Pixel 2’s locked bootloader. Approximately 40 users reported on XDA forum while many users registered their grievance on Google’s issue tracker. This issue seems to be more prominent on the Pixel 2 and not the Pixel 2 XL. The Pixel 2 was manufactured by HTC.