Because of the previously conducted test using espNOW most of the code already exists and now needs to be modified to work with the Semtech SX1262 modem connected to an ESP32C3 over SPI.
Luckily there is a great open-source library available: RadioLib. It is compatile with the ESP32 platform and abstracts the user layer from the hardware layer nicely.
The WLED usermod code with espnow interface is on Github already, due to the necessity to compile the project with my plugin a complete fork of the original project was created, including the CI toolchain.