followed all these steps that shared by @theapurva
Steps:
1. On each Button set VarStatus variable to the status: E.g. For
All button OnSelect property should be: Set(varStatus,"All")
In Progress: Set(varStatus,"In Progress")
Completed: Set(varStatus, "Completed")
2. Items Formula should be
If(varStatus="All",YourListName, //Display all items (without any filter)
Filter(YourListName,Status=varStatus)) // Display items fitered by Selected Status
@VJR Thank you so much for your help