Using classic Outlook for Windows in business environments
Just updated to the latest and finally got this feature!!!
Microsoft® Outlook® for Microsoft 365 MSO (Version 2302 Build 16.0.16130.20332) 64-bit
On the left-panel of Outlook, you can open email, calendar and now open ToDo (and even pop it out if you want it stand alone).
Once you do this, this Outlook integrated ToDo, or Outlook PoP-out ToDo is slightly different than the stand-alone ToDo app. The background and some settings are missing. But the key thing is that the "Open in Outlook" link now points to your local Desktop Outlook and not the web link.
Wow. Thanks Microsoft, this finally gives what I've been looking for, for at least the last 2 years. Awesome.