Freight Collaboration offers limited customizing options and there is no option to develop your solution. A customer has to create an Influence request and the SAP team plans them for the upcoming release based on their bandwidth and product roadmap.
Global track and trace is similar to Freight Collaboration but offers an option to create a custom model to handle critical business requirements in bespoke development. Interesting, GTT is not using ABAP 🙂 mainly Scripts.
https://nav-it.com/10-things-t....o-know-before-starti
10 things to know before starting a SAP BN4L Project