patch
https://api.clickup.com/api/v3/workspaces//tasks//time_estimates_by_user
Replace the time estimates on a task for specified assignees.
Assignees must be currently assigned to the task, or use assignee: unassigned to set a time estimates for unassigned work.
You can set up to 10 estimates per request.
Note: This endpoint is only available on our Business Plan or above.