Sticky Types with the function "work item" will provide you the ability to add estimates
Story Point on team-level work items
WSJF on ART-level work items
Check out Work Item Sticky Notes
Note: Both the Story Point and the WSJF attribute can be synchronized with your ALM-tool.
Story Points on Team Level
On team-level work items, the value attribute is the Story Point. We've preset the most commonly used values for you to choose from, but you can also set a custom value.
WSJF-Value on ART Level
Note: Instead of a WSJF-value you can use any numbered field from your ALM-tool to prioritize ART and Solution level work items.
On the Program Backlog Board and ART Planning Board, the estimation attribute is the WSJF value. This value is automatically set by the ALM tool synchronization, but if you want to edit it or need to enter a value, you simply click on the bottom right corner.