1- Slingshot towards the checkpoint
2- Once you reach the checkpoint/ground, tap jump again - you should do a jump farther and faster than a normal jump
Consider the solution to be:
1- Sit emote
2- A soft locked map/Ghost GA
If you’re still stuck after attempting the possible solutions above, consider finding the map guide video in the Mercy Parkour Code Spreadsheet (Mercy Parkour Codes) to see the intended solution or join the Mercy Parkour Discord (Mercy Parkour Server) to ask for help.