The people in charge of the Democratic party are always scared to push left thinking it will alienate their major voting base...aka older voters I think. Time and time again, left leaning policies are shown to be popular, but they're very reluctant to nationalize those platforms. Roe v Wade being overturned possibly made them change their mind a bit on how far left they can go.
So what will probably happen, let's say we continue to have a democrat as president and let's say we pick up 10% more seats overall in congress...the lesson they'll take from that is...."keep doing what we're doing, no need to change". If they don't win much "oh we need to move further right".
The news media keeps shifting further right and that doesn't help.