Just upgraded to v0.61.0 from v0.58.0 and noticed this new tab. Wondering what is missing from the data for this tab to show properly? Is a license a compulsory thing now?

The message doesn't say anything about the license. As mentioned in the message, Please upgrade to the latest chart version because whatever data exists with the old chart version is incorrect because it was collecting container host metrics rather than the actual underlying host metrics.

ya. i have actually updated to the latest k8s-infra chart according to the message.

Yes, the old data is incorrect and it takes time for new data to get populated and show up.