I’m guessing so too! I’ve tried not to learn about this. I don’t know the difference between GTM, Adsense, and DFP. 
Maybe so. All I know is that a site had the Google Ads working and then there was an upgrade and then the stopped working. I got blamed.
If Google [ad manager|dfp|ad plugin|gtm] requires some CSP setting to change because [Google|Discourse] changed something, it’d be nice to, maybe, create one of those annoying Dashboard notices about it?