Access Party List field from PowerApps

This may not be valid in this location but because the Party List field exists within CRM i thought this would be a good place to start.

We are trying to develop PowerApps to replace Dialogs which are to be deprecated soon. One of the fields that gets written and read is a Party list which i cannot seem to access on PowerApps.

What would be the reason for this?

Is there a way to provide a level of access for me to be able to write to these fields.