I think, and correct me if I’m misremembering, research like the world values survey shows that the US scores relatively low on individualism. Low, as in much further down the list than its public political discourse and rhetoric might suggest. I think, and again I think this is supported by research, that what is presented as individualism and «don’t step on my lawn» is a symptom of a deep lack of institutional trust, rather than true individualist values.
The great paradox here is that Norway, bastion of social democracy and the expansive welfare state, ranks at the very top when it comes to individualist values. This seems to support, contrary to right wing American political marketing, the notion that an economic and social safety net that provides real economic independence is very much a facilitator for freedom.
I realise I have simplified a very complex argument here, but I believe my overall point is valid. Americans aren’t really particularily individualistic, they just really don’t trust their country’s institutions, and I think that’s particularily true for those protesting the lock downs.