From the linked report...the largest change in attitude (toward acceptance) came from conservatives...surprised me when I saw this...also, the trend appears to be toward increasing acceptance. IMO there is more understanding now...as well as more experience/observation of these circumstances...
Link: https://www.pewresearch.org/fact-tank/2020/04/10/as-family-structures-change-in-u-s-a-growing-share-of-americans-say-it-makes-no-difference/