What good would it be to prove that there is a 150 foot wall of ice at the Antarctic coast when the Round Earth Theory also postulates that there is a wall of ice at its coast?
It doesn't predict the same thing and that difference would be indisputable proof that the Earth, not a Globe.
Round Earth Theory also says that there is a 150 foot wall at the coast of Antarctica known as Ice Shelves and Ice Walls. The only difference is the length of Antarctica's coast, which appears as a rim continent in the monopole model.
If we were to risk our lives and travel along the harsh and freezing waters of the Antarctic coast and find it to be a continent, what benefit would it really get us? We would just say that the Flat Earth models where Antarctica is a continent is the most correct.
Once there, if we were to find that Antarctica actually was a rim continent, we may very well find ourselves unprepared and ill-supplied for the length of journey, harsh conditions, and the navigational challenges of getting back home, and perish in the process. So, there is no significant benefit of doing this, really.