It will get fixed by this PR: https://github.com/armbian/build/pull/7015
If you don't want to wait approval of the PR, copy this overlay https://github.com/efectn-forks/build/blob/rk3588-edge-v6.11/patch/kernel/archive/rockchip-rk3588-6.11/overlay/rockchip-rk3588-hdmirx.dtso & replace okay with disabled and then add if as an user overlay using armbian-add-overlay -> https://docs.armbian.com/User-Guide_Allwinner_overlays/
