Hi, how do you check if the phone is telco set or not? Got special firmware shown in recovery mode?

Hi all. I have the base Galaxy S21 and do use it to play games like PUBG and COD. Since the phone doesn't come with a headphone jack and I need to charge it while playing, I bought a 2-in-1 Baseus dongle (L60S).

It works ok but there are times where the dongle seems to lose connection even when plugged in, then I have to wait a few seconds till its ok again.

Are there alternative 2-in-1 dongles or adapters that are more stable and consistent to use? Kinda irritating when playing a game and suddenly the audio cuts out when I'm holding the phone perfectly still.