Given that Maestro is MacOS only, I created a shortcut with Autohotkey:
Just create a new script with the following:
; Markdown Highlight
^+e::
Send,^c
ClipWait
Send, ==^v==
Return
; Syntax
; ^ = CTRL
; ! = ALT
; + = SHIFT
; # = WIN
; :: = run when pressed keys together
Works without delays even for large selections of text, only issue is that to revert styling you have to hit CTRL+Z thrice as the script canât apply the styling in one action (instead pastes â==â, then the selected text, then â==â again).