I will leave my response below despite realizing now, after posting, that you want this for the side pane, which I did not get before seeing image (just in case it helps).
Assuming you are unaware of this, I am happy to tell you that there actually already is a hotkey option for opening today’s Daily Note, although I am not sure what it is set to by default.
It sounds like you keep the daily note pretty consistently in a certain pane, so just focus on that pane and the hotkey should do the trick.
If, instead you are looking for a hotkey that resets your workspace and opens the daily note in a certain pane, you may want to consider pinning the daily note in that pane or maybe looking into the new custom workspaces.
Hope this helps.
