please help with my ryzentosh

on ryzentosh community i don't able to create a post but i need help.

i created my ryzentosh after various configuration, video and input problems all what seemed to be my problems have been solved. after configuring the ryzentosh i can't access icloud, communication errors are reported with the servers and even if for some system error i access the account i can't access the settings regarding icloud such as my family changes. the whole thing is done with opencore, my hardware components are:

mb: msi b450-a-pro-max

cpu: ryzen 5600g

16 gb ram

1 tb ssd

1 tb hdd

i don't have an external video card and i use the igpu of the processor.

the whole thing was done about a year ago, i have tried reinstalling but nothing, now i would need to use the ryzentosh as a real mac to avoid spending a lot of money so i would like to be able to use it 100% which seems possible (i think), i don't know what could be causing the problem.