Fortnite voice chat?

Hi. I have the following problem: my Fortnite voice chat only works to a limited extent. I understand everyone else, but when I try to talk it doesn't work. There's not even the speaker symbol with the lines. Why is that, how can you fix it?

Push to talk on? If so, turn off in the fortnite settings or hold down y

First see if you are on the right language channel:

because there's:

Game channel and the group channel.

Otherwise your microphone may be muted or you may have push to talk on.