Three groups of sovereign cloud offerings
Hyperscalers with sovereignty offerings: EU data boundaries, European operating companies or partner models. Benefit: full feature set. Open question: legal access via the parent company.
European providers: companies based in the EU, such as STACKIT, IONOS, Open Telekom Cloud or OVHcloud. Benefit: European law. Drawback: smaller service catalogue.
Private cloud: own or hosted infrastructure, for example based on Kubernetes or OpenStack. Full control, but your own operating effort.