SUMMARY
I toggled the option "support borderless maximized windows in different layouts" then enabled that option for my current layout.  Nothing happens.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.22.2
KDE Frameworks Version: 5.83.0
Qt Version: 5.15.2
Kernel Version: 5.12.14-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i7-4510U CPU @ 2.00GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 4400

ADDITIONAL INFORMATION
* I ran `latte-dock --replace` thinking restarting the application would help, but no good either.  Full reboot doesn't work either.  Also, KWin Wayland doesn't have the option to restart from CLI.
* Not sure if I'm missing something on my newly installed Arch, and I haven't tried it yet on KDE Neon Wayland because I can't compile the Buttons plasmoid on my Neon Unstable.
* Somewhat related, but I couldn't make the Meta key work with an application launcher on Latte.  I enable, then click apply, but nothing happens.  Unlike the borderless maximized problem, this would be untoggled when I open  Latte config again.