So by my understanding the answer is applying for "Advanced Commerce API" access. And then reading the docs and trying to implement custom solution for this issue.

Hi, Thank you for your answer, unfortunately it does not seem to answer anything. Could you please clarify/answer my questions. I feel like they are valid and your system greatly limits what we are able to do and if there is a solution or a way to solve these types of scenarios please let us know. Thank you.