We are experiencing exactly the same issue.
Our Apple Developer Program enrollment has been pending for several weeks as well. We have contacted Apple Developer Support multiple times, but unfortunately, there is simply no communication or meaningful response.
The most concerning part is not only the delay itself, but the complete lack of information. Developers and companies have production schedules, testing phases, release dates, and clients depending on these enrollments. Weeks of silence from Apple can seriously affect entire projects.
It is difficult to understand how a company the size of Apple can have such limited communication and support for the Developer Program enrollment process.
Apple really needs to improve this process and provide at least a clear status, estimated processing time, or an effective escalation channel. Simply leaving applications "Pending" or "In Review" for weeks without any explanation is not acceptable.
Unfortunately, you are not alone. Many of us are currently facing the same situation.