For sure. Also, IMO the most important social issue discussed today, Medicare for All, is also the most important economic issue. I'm at the point where if you call yourself socially liberal and are against M4A, what are the issues you're socially liberal about, other than shredding family values?
you can divide both of the social and fiscal axes into an almost infinite number of less comprehensive axes. some of which naturally or logically correlate and others which don't. like m4a is sort of on a social welfare axis, which may or may not correlate with views on human rights, civil liberties, social equality, foreign policy (too complex for one axis, but i don't want to break it into multiple axes), populism, etc. you could also either oppose or support m4a based on all sorts of reasoning that is not essentially ideological (hypothesized efficiency/efficacy, concern for economic disruption (spracne?), distrust of either business or govt, exposure to/trust in medical care in other countries, etc).
so i don't think your idea that you can use m4a as a useful litmus test for social liberalism is accurate or useful.