Looks like DAP-X1860 was merged here: https://github.com/openwrt/openwrt/commit/3c31f6b521bb5fc49e222a8f2bcd454b73452a0e
Update: I built a new image with the applied patch. The kernel partition size was changed from 4096k to 8192k, so sysupgrade doesn't work. Flashing the factory image via recovery web interface is working.
Image: https://github.com/RolandoMagico/openwrt/releases/tag/Build_2023-01-07