Hi Pawel,
I can't see "Ask a question about your data" in Current Channel, Semi-annual Enterprise Channel and Semi-annual Enterprise Channel (Preview).
Based on the screenshot you provided, I assume you are using Semi-annual Enterprise Channel or Semi-annual Enterprise Channel (Preview). We are sorry that this feature is not supported in these versions. Based on the article, it will be released to all the channels gradually. Since every feature will be published by the production team and it's hard to know the exact date of it as we have limited resources.
We are sorry for the inconvenience caused for your work and we sincerely suggest you submit the feedback within Excel, it's the direct way to send your concern to the related team and get the response from them.
For your reference: How do I give feedback on Microsoft Office?
Appreciate your cooperation and understanding. Hope you are all well during this period.
Best Regards,
Ivy