Complication error/potential bad configuration?

[jono-chandler]

Context:

• OS: Windows 11
• Using Arduino IDE
• Board being used: RP Pico (RP2040)
• Library required to complete project: SX126x-Arduino
• Cloned arduinocore-mbed repo to "C:/users/xxxxxx/Arduino/hardware"
• Cloned arduinocore-api repo to "C:/RP240/"
• Created a symlink from /arduino-git/mbed/core/adruino to c:/rp240/arduinocore-api/api using Link Shell Extension (mklink was causing me all types of challenges) (Link shell extension "Link Source" was api dir, dropped symbolic link in mbed/core/arduino dir)
• Installed the Arduino Mbed OS Nano Boards board manager for Arduino IDE (does this install all required ARM compiler toolchain elements?)

When compiling the LoRaWAN example from the SX126x-Arduino library , compilation failed with the error #include <mbed.h> no such file exists etc, within one of the source files for the SX126X library. Started doing some manual absolute file path changes to the library, but that lead me down a rabbit hole of absolute paths on absolute paths etc etc. Which leads me to think I have made some errors elsewhere?

Anyone else has similar issues/any suggestions?