Yes, from the data I have looked at, it sure seems like a lot of prominent research universities, both private and public, had increasingly been treating well-qualified full pay Internationals as an important source of operating funds. And that includes a variety of universities with excellent Math departments.
We’ll have to wait for fresh data, but I would guess that if anything, the recent dynamics will have made the admissions situation in even more favorable for full pay, well-qualified Internationals.
On the other hand, high need Internationals were already facing far more limited options, with very daunting admissions at any prominent college which even sometimes offered the required aid packages (even the need blind ones, since that seemed to mean it was just equally hard for any International to get admitted).
And unfortunately, I would not be confident the recent dynamic has been so favorable for high need Internationals applying to prominent research universities.