Open Emails in Separate Window in New Outlook - don't have the "Open in new window" option

Thank You AI for your non answer. I found solution from a human.

Switch panes from from left right/up down / right then save. Then go back to your preferred layout.

I started using the new outlook. I want to open each email in a separate window.

Browsed and found this solution:

In the Outlook Settings (Gear icon on top right)-->View all outlook settings-->Mail-->Customize actions Under Message surface, ensure that "Open in new window" is selected and Save.

but, I don't have the "Open in new window" option

I cannot find this in Customize actions: "Under Message surface, ensure that "Open in new window" is selected and Save".
Very frustrating as the double clicking to Open in New Window is hit and miss (I actually had to slow down my mouse settings speed of double clicking!). Sometimes it works well but other times it will either only open in the message list so I then have to close it to see other emails (Note that I am a heavy user of ALT+TAB to move between windows); OR it opens the message in a separate window and in the message list giving me double whammy!

launch Outlook->Files->Options->Mail->Scroll down and find 'Replies and Forwards' section-> Check 'Open replies and forwards in a new window'