Optimize cost of SQL Managed Instances with new stop-start capability

Yes, we have two Pay-as-You-Go Dev/Test subscriptions, and both exhibit this issue.
What worries me though is that both of them also had zero quotas by default for Subnet and VCore for all regions, which is odd as it should be 6 and 320 per region according to documentation. Now, the quotas have been granted for one subscription and region through a support ticket, but seeing as that didn't help to gain access to the Nov2022 feature wave, I wonder if these subscriptions had something else missing right from the start.