Support for Xiaomi Wifi R3P Pro?

Hello,

I have found this topic : How to compile mt76/mt7615 drivers on OpenWrt?

But honesty, I did not understaind !
Only pilot for wifi is not ready for actual kernel version but not how-to make the add-on. (and it is probably not into my capacity scope)

It is possible to compile a sysupgrade file for 19.07 and adjust the 'official' topic https://openwrt.org/toh/xiaomi/xiaomi_r3p_pro ?
Currently the sysupgrade it's not directly ready (for a very newbie like me)

Thanks-you,

Jean-Charles