This will allow you to package Aprx for OpenWrt. Assuming you have the build system installed, copy the aprx folder into packages and run make menuconfig. You will find aprx under the Network category.
Alternatively, you can build the aprx package alone with:
make package/aprx/compilePre-built packages are available under the Releases. Just download the package to your device and run:
opkg install <package>.ipk73 de SQ2MO