Issue With The Wired Earphones

I have a iPhone 15 and I've been using these AKG Samsung type C earphones (which have a microphone). Initially it was working fine but now I'm running into issues. I can listen to my music and videos just fine, the issue lies with phone calls. When I get a call I can hear the person's voice however when I speak they aren't able to hear me.

I connected these earphones to my android device through the type C port and tested it out and it works fine even with the calls. The person on the receiving end can hear my perfectly.

What could the issue be and how can I fix it?

I look forward to your response, thank you.