Need Xfinity to unlock my new Pixel 7a phone so I can use it on my Google Fi account (I'm not an Xfinity Mobile customer).

I do not have Xfinity Wireless/Voice/Phone service. I have Google Fi instead, and I just received an upgrade to a Pixel 7a. Unfortunately it's locked for Xfinity (I have no idea why...mistake at the warehouse?) and I can't activate it until Xfinity unlocks it. Is that even possible?