How do you show season level in feed in Fortnite?

1. Launch Fortnite
2. Click your Profile Icon on the top right.
3. Select Settings.
4. Select Account and Privacy tab.
5. Scroll down to Gameplay Privacy.
6. Toggle your Season Level In Feed on to show your season level to players that are not in your squad.

Remember,  it will only show your level according to the current Fortnite season. This means that it won't display your actual account level.