@karussell They don't explicitly say that they're incorporating Open Street Map data---instead saying that you can bring "your" data alongside Google's---but, as evidenced by your screenshot, and by Google's intro video here at the 41 second mark:
https://youtu.be/g9F-_tCakL8?t=41
It certainly seems like Google views Open Street Map data as fair game for inclusion within their "Geospatial Reasoning" product. Their promotional material shows a map rendering that bears a very strong resemblance to Open Street Map's default "Carto" raster tile rendering style, encouraging their potential customers to believe the same.
That is as clear a violation of the ODbL as can be, which was written in large part specifically to exclude Google from using OSM data in its own customer-facing products. Laundering license violations through AI doesn't make them not violations.