I have a simple web site page with a map (from Google Maps) embedded into an iFrame.
I've found a very fast way of doing this, which could be also helpful. This site creates a cookie less iframe which can be place for instance, in a visual composer for wordpress maps container https://www.uwp.is.ed.ac.uk/3rd-party-widgets/maps/
I've tested it and it won't load NID cookie, so no need to get consent for it.
Hope it helps