Terraform ressource port_blueprint_permissions missing configurable read permission

[Jeinhaus]

We would like to make all blueprints readable only by their owning teams.
But at this point, the Terraform ressource port_blueprint_permissions only supports the register|unregister|update|update_metadata_properties properties.
It seems, that the API does not support this either.
But changing this manually in the UI in the blueprint's permission does work.

Is this something that can be added, or is there a reason this is not configurable?