USB-C earphones don't work in calls

Hello, my father has bought Galaxy Note 20 for himself and he gave me his Galaxy Note 8 with AKG USB-C earphones that came with Note 20. I plugged them in and they work, music is heard clearly and all, but in calls sound is played through internal speaker. I've searched for whole day and couldn't find an answer to that. Is it possible to make them work in calls and if it is then how?