As far as I can see, you generally have to distinguish whether you are the "organizational admin" or just a user who has been granted access by the org admin to submit drivers.
Using the information on this list from some time ago, and after some discussion with Microsoft's AI, I was able to submit a support request and received a confirmation email.
However, I didn't see a reply for 2 or 3 weeks, and I hadn't recorded an URL where I could check the ticket status online. Unfortunately, it looked like the confirmation email didn't contain such URL.
In the meantime, I saw an information in my account settingss that my own account would have to be verified, but when I had a closer look together with our admin, we saw that he was the one who needed to verify his account.
After our admin had done so, the request in my account setting disappeared, but I was still locked out of the dashboard.
With the latest information from the OSR forum, I was able to create another ticket, and on the web page where I created the ticket, I saw an URL where you can check your ticket staus online.
This time I recorded that URL, opened the page, and after I had entered my old ticket ID, I saw that the ticket had been closed, but someone from MS support had sent me a reply the day after I had opened the first ticket.
I never saw that reply, but asked our email admin to check for it, and we saw that it had been classified as spam due to some strange header line.
After the spam stuff had been fixed, I also received a reply for the new ticket, but there was obviously only some standard text like, "account has been suspended due to non‑compliance with the Hardware Program" and "all partners are required to accept the current agreements and successfully complete Account Verification".
I neither see any agreement that hasn't been accepted, nor another request for account verification, so I have no idea what the support guy still expects from me when he writes, "If you can demonstrate that the account meets the compliance requirements, please provide the relevant supporting evidence for review."
I also told this in my reply in the ticket, and asked for some details what was missing, but yet haven't received any further reaction.