An update on this topic: RadioLib just updated to version 6.3, allowing you all to use its (beta) LoRaWAN support straight from your favourite library manager (Arduino / PlatformIO). No need to clone locally anymore for normal use!
If you use its LoRaWAN stack in any way, we ask you kindly to share your experience! Does it work just fine, were there hiccups along the way, is it a complete disaster? Please let us know (and for actual issues, file those on the GitHub repository, please and thank you 
)