The answer is addressed in the Dark Theme Wishlist thread.
The short version is that the foundation of the app over 5 years ago wasn’t built with things like customizable layouts in mind. In order to accommodate Dark Mode and landscape mode they have to rebuild an entirely new app from scratch due to the design debt and limitation built into the foundation of the app.
That is not to say Wyze won’t do it. Wyze has placed this on the “Researching” and “In Progress” category of the wishlist. Here is a link that includes quotes of a couple of recent statements on the matter:
Someone just below that comment had a really good idea that Wyze could temporarily make a second app for now where they just change the default colors to dark mode for those want it. Then they don’t have to wait for the app rewrite to allow alternating layouts.
There is also a similar Wishlist asking Wyze to just make the app permanently darkmode for everyone until they get it fixed to allow people to choose:
FWIW, on a Moto running Android 10 ‘Override Force Dark’ setting doesn’t persist through a device reboot.
Otherwise good (enough) for now. Still does a solar flash in my eyes when swiping between Events in landscape orientation, but hey, when I need to do a lot of that in a session, I switch ‘Override Force Dark’ off…