@Akshay When the notebook cell creating my map evaluates, a small portion of the map is invisible and a scroll bar appears. The only way to see the full extent of the map is to click the expand output button which is unfortunate.
Actually I take that back. When I adjust the size and rerun the cell, the map size does not change. BUT if I hit the Toggle App View button, it renders correctly. And then when I return to the notebook, it then is displayed at the correct size.
Anyhoo, I got to what I wanted. Looks like at a height of 500 px, it'll still render the entire map without loading a scroll bar. Appreciate your feedback!