Hello @ukiri,
You can use the Round Robin Pro app for this.
It integrates with monday.com automation so you can use any simple or complex routing to assign leads. It also supports a Percentage (weighted) based distribution model. Here are a few other features:
Set working days and hours for users
Set active/non-active state for users
Set Timezones for users
Set Absent Status (for example, when a user is out of office or sick, no items will be assigned to that user)
Here is a demo:
You can read more about the app here.