I recently bought a Samsung S20 FE 5G (around 2months ago) and I decided to buy a usb-c to 3.5mm headphone jack adapter as I couldn't plug headphones into the phone due to the 3.5mm port being gone. When my adapter came it worked perfectly fine for listening to music. However, when I connected my headphones (which has an external microphone) into the adapter to use the microphone for talking on calls it wasn't letting any of the audio I was talking through. I later tried to do a voice memo to hear myself whilst using my headset and I sounded really really quiet, almost muffled.
How do I fix this as I am thinking of returning the adapter and buying a new one.