Others Hear me but Can't Hear Others in Microsoft Teams Meeting

Set Up Your Active Audio Device
Make sure you select the audio device you want to use with Microsoft Teams. Here are the steps to follow:
Launch Teams and click on your profile picture.
Then click on Settings.
Select Devices.
Use the drop-down menu to set up the Audio device you want to use (speakers/headphones).
If you’re in a meeting, click the three dots and go to Device settings. Make sure your speakers or headphones are set as the audio devices to be used with Teams.
Alternatively, you can also set your device as Windows 10’s default audio output device. In this manner, Windows 10 will send all sound to the specified headphones/speakers.
Go to System → Sound → Output.
Select your speakers or headphones as the default output device.
Restart Teams and check if you can hear all the attendees now.