Documentation / Examples for using initVariant() in variant.cpp?

[mpfeil]

Hi,

I am pretty new to Arduino and ESP32 programming and I am sorry for asking stupid questions (I guess 😄 ).
I am working with a custom board (sensebox_mcu_esp32s2) and evaluating what initVariant() in variant.cpp could be useful for?
Is there any documentation what could be done in initVariant? Or are there examples what others are using it for? Of course I looked through all board variants and checked out the variant.cpp files and most of the times it is used for powering on / off pins.

Would it be possible to switch on and off an on-board LED with a delay within initVariant() or check if a button was pushed?