Immersive reader doesn't seem to be the issue on the Mac user side of things, so I am still experiencing the same issues I had addressed in my original post.
I have searched the internet, and the images I found showing where "Immersive reader" may be on the Mac version seem to always show the Windows version, as if Microsoft doesn't realize the UI/UX are 1000% different from one another, and have totally different features. They never reference if the "ribbon" or the "View" tab are being utilized in Old Outlook or New Outlook either.
I think we can all agree that Microsoft has just been slacking a lot on quality of their products, so long as they are making the cheese though!