https://www.gamespot.com/articles/destiny-2-ascendant-challenge-location-how-and-whe/1100-6462031/

Bungie continues to rotate the Ascendant Challenge in Destiny 2: Forsaken. The latest weekly reset has brought another new location and mission objective for the activity--hopefully you don't mind platforming. Here's where to go and what to do.

At this point, more enemies spawn in and one knight will begin attacking you. Kill the knight, and the other two will join the fray along with additional enemies. Take them all out, and you'll again have to platform across a series of rocks, now with enemies to make things more challenging. There is debris moving through the area, and at least certain things you step on will disappear after a short period of time, so make sure not to linger. Make your way toward a platform with a large blue object on it to complete the challenge.