Will it be possible to buy/import a OnePlus 7t PRO from OnePlus in the US for use on TMobile?

I skipped the OnePlus 7Pro to wait for the OnePlus 7t Pro, and we have known for a few weeks that's not going to happen. I don't like the 7t, and now the 7 Pro is too old to feel good about paying full price for.

So I have never bought an international version of a phone, or had to go through the import process. Will it be possible to do through OnePlus, or will it have to be a 3rd party distributor? Also will the frequency bands work on the US TMobile network?

Thanks for any help.