Possible copyright violation

Hello,

following the steps to be taken in case of a copyright violation, I would like to have your feedback on a potential violation of OpenStreetMap’s copyright on this page:

https://wetter.tagesschau.de/unwetter/

Should steps 2 and following as outlined in the wiki be taken?

Best regards,
dasa123

Can you explain where you’ve found OSM data in that map? I’m probably missing something, but I can’t spot any of the telltale signs of OSM usage at a glance.