In late 2021, Google Ads introduced Performance Max campaigns for all users. Supermetrics moved to a version of the Google Ads API that supports this data in early 2022.
Note that, according to Google, Performance Max data is only available in Campaign reports — for example, queries at the ad group or ad level won't return results.
If you're missing Performance Max campaign data from your Supermetrics reports, include the "Advertising channel type" dimension in the query to see which campaigns are Performance Max campaigns.