Whenever i read other people's code and there is some unicode character that i want to know how to type it, i just copy and paste it in the REPL help mode. For example, if i want to know how to type the ⬲ character:

help?> ⬲
"⬲" can be typed by \leftarrowonoplus<tab>

I think it would be useful to see this information when hovering over an unicode character instead of going in the process of copying the character → opening the REPL → typing ? → pasting the character → pressing enter.