Set Show Season Level in Feed to off in Fortnite’s privacy settings. That hides your level from other players when you thank the bus driver, while you can usually still see it yourself.

Steps

  1. Open Settings in Fortnite.
  2. Go to Account and Privacy.
  3. Scroll to Gameplay Privacy.
  4. Turn off Show Season Level in Feed.
  5. Apply the change.

Note

This only affects what other players see in the feed; it does not stop you from thanking the bus driver or prevent level-related quests from working.

TL;DR: disable Show Season Level in Feed in Account and Privacy to keep your level from appearing when you thank the bus driver.