gsm libery help needed

I hope you guys can help me
I am trying to build a rotary gsm phone
and I am using the ttgo t-call board (a esp32 + sim800l combo)

but i am running into a problem
the script i am rewriting uses the sim900 library
and it leans on the call.h funktion (link)(link 2)
but this liberary wont run on the esp32
(link 3)
the t-call has a weird way of booting and stuff

so now my question
can somone add the call funktion to the t-call library?