Padding is already a feature I do believe, you can set it per profile with the following:

"padding": "10, 10, 10, 10"

I have it set to all 0s since it interferes with the emacs background color setting, so it might need a unit in there too.

Can you share your config for that?

Sure, here you go: https://pastebin.com/qJBRFb3V

Let me know if it works. Probably has a bunch of junk you won't need (like various custom color palettes I played around with). I may or may not have edited other .cmd files outside of the ConEmu.xml realm so that may warrant some tweaking too

And you'll need the Monaco Font (and Ubuntu Mono for the lambda) for it to look exactly the same