"There’s very little in either bill for Democrats. Both bills allow immigrants currently facing the loss of their protections under the DACA program (which the
Trump administration is currently fighting in court to end) to apply for legal status in the US. The compromise bill would allow many of them to ultimately apply for green cards, making them eligible for citizenship.
But both bills make cuts to legal immigration (by eliminating the diversity visa lottery and some forms of family-based immigration), which Democrats have said is a nonstarter. And both would significantly tighten asylum standards and make it much easier for the government to detain and deport asylum seekers — something Democrats are much less willing to get on board with as the
Trump administration’s separation of families at the border remains the top news story."
Can't really fault the Democrats for not getting on board if the Republicans aren't going to compromise with them. Note also that these bills were written in the wake of Trump's comments about not wanting immigrants from "poophole" countries.
As pointed out in my other links, there was a bipartisan bill in the Senate in early 2018. Trump killed that one too.