Indeed. And SAP has no cooperation with any European cloud providers, afaik. It's the big three plus alibaba. SAP wants to move away from on-prem, but I guess it has a solution for critical applications. Maybe that can be shoehorned onto OVH or something.
Not entirely true. You can do SAP RISE on Telekom (not Open Telekom Cloud, forgot the name of the thing) and as far as I know STACKIT is currently in beta. Apparently the AWS Sovereign Cloud will be possible as well. Its just way more expensive because Microsoft and AWS use their monetary power to give SAP better offers (just guesswork obviously, its not like SAP would tell you).
It seems OVH does support SAP. https://www.ovhcloud.com/en/solutions/sap/
How good/bad it is, I have zero expertise.