[deleted] yes buying straight from google will get you an OEM unlockable device (if selected without carrier option, but it's very clear in the process).
Out of interest: Can you link to some threads where people say they couldn't get a pixel 8 pro OEM unlocked from Google? I can't find any, just people who bought at carriers or second hand market. In general Google, BestBuy and Swappa will give you obvious OEM unlockable options.