The default Verdana font does not have that character and a few others, however other font sets, such as Segoe UI, does have it. You can change the default font in Preferences.
There is not much that can be done about the high DPI issue until the toolkit developers provide the feature. Progress can be slow on things like this because wxPyhon is a cross platform GUI. The developers have to make it work on three platforms.
Developer, Bible Analyzer
But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness. (Rom 4:5 AV)