Unlocking oem pixel 7 pro

You get better deals through Google and their trade in process is a very easy process.

You need to be a Tmobile USA customer to be eligible for an unlock code.

If the seller reported selling the phone as unlocked I suggest contacting the seller to ask for a refund.

You need to be a T-Mobile customer and meet all of the SIM Unlock Policy requirements to qualify for a SIM unlock from T-Mobile

https://www.t-mobile.com/responsibility/consumer-info/policies/sim-unlock-policy

The device must be SIM unlocked for the option for OEM Unlock toggle to work in Developer Options.

I recently paid off my device and was able to sim unlock my pixel 7. After unlocking the SIM, the OEM unlock is still grayed out. Is the pixel 7 from T-Mobile not able to be unlocked? Even after the SIM unlock?

Did you do a permanent SIM unlock or just a temporary?

On Pixel phones sold by Tmobile they wil be permanently unlocked after 40 days of usage on Tmobile towers whether paid off or still having a balance.

Are you trying to unlock the bootloader?

I am permanently unlocked on TMobile for the SIM unlock. I am trying to unlock the bootloader. I need to toggle the" OEM unlock" but it's grayed out. After the full permanent sim unlock. I thought the" oem unlock" would be available but it is currently still grayed out.

That's odd.  Usually a permanent SIM unlock will enable the toggle for OEM unlock on Pixel devices.  Have you tried a factory reset considering the OEM unlock toggle would wipe the device anyway?

I have factory reset and tried to boot with a different SIM.  It is indeed SIM unlocked.  Does the SIM need to be active? I booted with an inactive US Cellular sim. It did pick up that it was a US Cellular sim but it obviously didn't have any cellular connectivity or data. I inserted the T-Mobile SIM and everything booted up fine. But with either sim inserted it is the option for OEM. Unlocking is still grayed out.

You may find your answer faster on the Google support page for Pixel phones.