One of the first challenges of Fortnite's Bullseye Mission of Season 10 is to land on different Bullseyes in different matches.
No particular difficulties here since Bullseyes are visible from the Battle Bus and flash red. Make sure you land in the middle of the Bullseye. If you are looking for some specific locations, this should help you:
Map
A small fireworks display will appear if you land on the right location and indicate the validation of this part of the challenge.