Open a PR here https://github.com/armbian/build/tree/main/patch/kernel/archive/rockchip-6.1/overlay
If he doesn't want to be contacted, there is nothing we can do. This is volunteering position at best effort principle. Some have time, interests and love, some don't. When we notice maintainer becomes unresponsive, board is (at release cycle) moved from "Standard" to "Community support" unless someone else take it over ...
https://github.com/ich777/pikvm-rockpi-e
This would be much better to be done as extension to the build framework.
Examples:
https://github.com/armbian/os/blob/main/userpatches/extensions/ha.sh
https://github.com/armbian/os/blob/main/userpatches/extensions/openhab.sh
Docs:
https://docs.armbian.com/Developer-Guide_Extensions/
There is another person, that is around, doing similar https://github.com/srepac/kvmd-armbian perhaps teaming up and do it properly & maintainable? And with IMO less efforts.