Raspberry Pi 3B - IoT Core 17763.253 - Portrait mode not supported

[LukeL99]

Changing lcd_rotate=1 in config.txt on the boot partition does not rotate the display. The UI toggle does not work either.

Here are similar issues I've found across the internet:
https://www.raspberrypi.org/forums/viewtopic.php?t=227036
https://social.msdn.microsoft.com/Forums/azure/en-US/934dbf19-420b-441c-986f-fc3b33a1b1d0/win-10-iot-portrait-mode-for-raspberry-pi-3-broken?forum=WindowsIoT
https://social.msdn.microsoft.com/Forums/en-US/63392e65-5cf0-4d5c-a7cf-0af0023f1ac0/portrait-oriented-hdmi-display-with-win-10-iot-and-raspberry-pi-2?forum=WindowsIoT

My understanding is that the generic display driver provided in the raspberry pi maker image supports screen rotation, but maybe support is missing in the BSP? Is that correct?

We're using a RenderTransform to rotate our UWP app, but the keyboard doesn't respect that rotation so it shows up on the side of the screen instead of the bottom.