I searched around in Medicare if they changed their view of breast augmentation. They did not, in fact it is depending on each individual case if they pay for bottom surgery, and the decission can be different from state to state.
As late as 2020, breast augmentation was still considered to be a cosmetic procedure, and I doubt that anything changed under the Trump regime.
With a little luck, we might see some positive movement under Biden, but those are political decissions, and who knows what will develope. Medicare/Medicaid is controlled by politics, and one never can predict what will be decided.
Hugs
Linde