The below page explains what to do when you are missing report suites from the Target user interface after being provisioned for the Analytics as a reporting source for Adobe Target (A4T) integration
Report Suites are not Available in Target after A4T Provisioning
This article is helpful, but I still cannot finish configuration after all done.
as you can see, I cannot select Marketing cloud solution used for marketing, and I cannot choose analytics as report source in target.
It would be best to reach to Adobe Customer Care. They should be able to resolve this quickly
This generally happens when the analytics account is not linked in the experience cloud or if the user does not have the right permissions in analytics.
Could you please check if you can access the different report suites in analytics in the experience cloud to quickly validate this.
Hope that helps.