Unlock Bootloader (Read-only)

I am considering getting the Pixel 3XL from Verizon and am wondering if it's possible to unlock the bootloader, and install Magisk and custom recovery on it. If not, I think the unlocked OP6T might be a better route for me to go.https://thegadgetwire.com/tutuapp/
https://thegadgetwire.com/panda-helper/
https://thegadgetwire.com/appvalley/