Are there any areas in Mississippi and Oklahoma where Biden won the white vote?

[Sol]

Biden almost certainly won the white vote in the college-y parts of Norman.

[Sol]

Taking a look at Oklahoma more granularly, I think that Biden likely won the white vote in the core of Norman and in parts of Central OKC, but it's pretty hard to model because both have a fairly diverse makeup--a lot of places which are 65%ish white but with high single digits in other demographics.

That makes it hard to predict because it means lots of Native and Latino voters, who are likely more Dem than white voters but not unanimous, and also because both have plenty of Latinos (as per above) and Asian voters, who are likely less frequently eligible. Probably something like 55-45 or even closer.

Tulsa seems less Democratic with the white vote, with the strongest D white areas around the uni.

[Sol]

Biden lost the white vote in every Mississippi precinct.

That seems very unlikely IMO. Even on the less favorable 2012-2016 numbers available in DRA there are few in innermost Jackson where dems likely win.