Device overlay update via rsetup

Hello,

I am having some trouble setting (any) device tree overlay on my 5A running Ubuntu. I have a raxda 4K camera which I need enabled, but simply enabling the overlay through rsetup does nothing (even after reboot). I get the usual feedback from u-boot-update that the extlinux.conf and the config for my kernel have been updated, but nothing happens.

I have the official raxda ubuntu 22.04 image build 18 installed from here. Upon apt-get upgrade my kernel has been updated to

rock@rock-5a:~$ uname -r
5.10.110-21-rockchip

I have tried booting with both 5.10.110-21 and 5.10.110-12 and in neither setting the device tree overlay via rsetup seems to work. So my question is, how should I go about this? /boot/hw_initfc.conf and /boot/uEnv.txt have both been retired.

Note: I am able to set the fan behaviour via thermal governor, so rsetup does indeed seem to do something, just device tree overlays don’t seem to work for me.