Powerapps cascading dropdown sharepoint lookup

1. How do I cascade a drop down in PowerApps?
2. Can you use a lookup column in PowerApps?

How do I cascade a drop down in PowerApps?

Cascading Dropdown in PowerApps means one dropdown control value depends on the previous selection in a hierarchy, i.e., when a user picks an option from one dropdown control, the values filter in another Dropdown control.

Can you use a lookup column in PowerApps?

Add a lookup column (Many-to-one relationship)

On powerapps.com, expand the Data section, and then select Tables on the left navigation pane. Select the Relationships area. Select Add relationship, and then select a relationship type, such as Many-to-one.