and there won't be, until you (or someone else who owns one) add it ...
OK, kiddin9 (open wrt ai) sources are here
Try to find the dts-es yourself, probably old version and try to make them into official openwrt.
As you already figured out they have problems with openwrt 24. So start at v23 v24 comparison.
Yes, I tried looking for an older firmware, but sadly, there is none.
https://dl.openwrt.ai/releases/23.05/targets/mediatek/
[Admin edit: de-activated the link; please be aware that the above link is not from the official OpenWrt Project ; use it at your own risk]
You need to find it in kiddin9 source tree, backtrack to v23 , v22 until you find something-sl?3000-something.dts Do not rely on that other site too much.