How to know if wifi is bust (p20 pro CLT-AL00)?

I got a p20 pro (CLT-AL00 model) with my wifi not working. What I mean is that when I tap on the wifi it would turn blue then go back to being greyed out. I tried factory reset but to no avail. Is there a way for me to check if the hardware module is bust?

Also ive seen the ifixit diagram wherein the wifi and bluetooth is located on the same module. Bluetooth is working fine for me but should I replace the whole module? I am also having a hard time finding the parts compatible to my phone model (chinese variant)

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