Modifier Cannot Access Namespace Function Using doctl CLI with Full Access Token

My role is currently “modifier”. When using doctl serverless connect, I receive the error:

Error: GET https://api.digitalocean.com/v2/functions/namespaces/{namespace-id}": You are not authorized to perform this operation

Even with a full access token (create, read and update), it seems that modifiers cannot access namespace functions. Is this a known limitation, or does it require specific admin or delete access to work with namespace functions via doctl?