Democrats actually lost support amongst hispanics in 2020. Republicans gained 8 points from Hispanic voters from 2016 to 2020. The Hispanic group was the biggest group in the "minority" category that went republican, beating any other "minority" category by more than 2x. The biggest gain for Democrats is +3% from white voters from 2016 to 2020.

If you pander to a group about solving an issue for that group and then lose 8% of those voters to the other party, then it's not surprising that the issue is on the low priority list, if on a list at all. If anything, it'd be on the list because "white" voters support DACA (based off of demographic voting data and only looking at the DACA issue). It isn't shocking news, I mean, just browse this forum. Imagine if Biden & Democrats spends all their political capita to get DACA people citizenship tomorrow. There will be DACA people that vote republican in the next election. It's the same reason why hispanic voters went more republican in 2020. DACA is not an important enough issue for hispanic voters.

I am not surprised DACA is taking a back seat for various reasons. If by Oct / Nov rolls around and nothing is happening, then chances of something happening gets lower as time passes. Democrats are in serious risk of losing the legislative branch in 2022. The way state legislators are doing redistricting & voting, republicans will have the house for quite some time if they win.