The broad strokes of Superman’s origin is a story I’d wager the majority of the world knows. The fine details have changed with various retellings over the years, and bits have been added on to the mythos (Kryptonite didn’t show up until the radio show began, for example), but the bare bones of who he is and how he got here are common knowledge.
Superman and Lois absolutely respects their source material, and does a great job giving a few changes that work in the modern era without making everything dark, edgy, and mean, or ridiculously saccharine sweet. It manages to be about family and get the tone right for the dynamics, and still have plenty of Super-action.
The Crisis on Infinite Earths continues on Batwoman. The first part had several cameos and a lot of surprises, as the extent of the high stakes was driven home by so many deaths. The special after-show, ala Talking Dead for Walking Dead, confirmed that all those worlds we saw in quick glimpses were destroyed, so the body count is already immensely high.