I maintain that it would be realtively simple to create an open source version of an app/protocol like this that serves people’s needs for this exact use case, and if it were designed for any community to use, it could be essentially free as you say and high quality, and be a single point of service for everyone.

If this were done right it could put all these thin platforms out of business and allow delivery drivers to establish fair terms for themselves.

This would be a really good fit for federation I think.