Budgie acts like it's there, e.g. I can move windows and stuff off the primary display into the TV(--right-of).
Here's my
xrandr --listactivemonitors
Monitors: 2
0: +*eDP1 1366/340x768/190+0+0 eDP1
1: +HDMI1 3840/1016x2160/571+1366+0 HDMI1
here's my display/drivers
sudo lshw -C display
*-display
description: VGA compatible controller
product: UHD Graphics 620
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 07
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:142 memory:ee000000-eeffffff memory:d0000000-dfffffff ioport:f000(size=64) memory:c0000-dffff
I searched thoroughly and tried everything I came across, from updating my firmware to adding a custom mode to xrandr and disabling secure boot/fast boot. Nothing works.