Ps5 microphone is not working! Help!

A few days ago, two friends (one with a PS5 and the other with an Xbox) and I started playing Abiotic Factor. The problem is that out of the three of us (I also have a PS5), I'm the only one with microphone issues.

When we use Discord to communicate, everything works fine, but as soon as we enter the game and want to use the in-game audio, I can hear them, but they can't hear me.

- The microphone works perfectly.

- In the settings, my headset microphone is selected as the one in use.

- I tried reinstalling the game.

- I didn't touch any options in the menu, but after discovering the problem, I started touching things to see if anything would change.

- If I try to remove my headset, the controller microphone doesn't work either.

- We tried changing the host.

- I tried playing a game by myself, but even then my microphone is not detected.

This is quite frustrating because we are currently playing through Discord, but we know that we are missing out on a very important part of the game.