Filtering Dataverse Choice Column

[Digital]

I'm new to Dataverse and having trouble filtering on a choice column to populate a combobox in Power Apps. I have a Dataverse table 'Staff' that lists employees and their role.

Columns:

EmpName (Text)

Role (Choice)

Role choices are: Manager, Operator

I have a combo box in Power Apps called cmbManager. I want to filter the items so only the names of people with role of Manager are displayed.

Here is what I put in the Items:

This gives me a delegation warning and incompatible type (Table vs OptionSetValue(Role))

Filter(Staff,Role = [@Role].Manager)

Another attempt but again get incompatible type

Filter(Staff,Role.Value = [@Role].Manager)

[CNT]

@Digital Glad to help!