Someone else pointed out that they blocked the fracking bill.
However, this is a tough topic for Dems, and it's one of the reasons the Teamsters haven't endorsed them; one of the reasons is because industries like fracking provides well-paying blue-collar jobs.
Remember, back in 2016, when Hillary said at a rally that if she was elected they were going to shut down the coal industry? That was a "they said the quiet part out loud" moment for blue-collar industry, and while it's too much blame to lay on Hillary, it really did drive another nail in the coffin of blue-collar support for Democrats, which they're still struggling to recover.
Democrats have two conflicting goals: support blue collar jobs, and stop environmental destruction. Actions like this benefit the environment, but cost them votes and the support of Unions.
It's a catch-22. Biden did a fantastic thing showing up at that picket line, but there's a long way to go to recover those blue-collar votes.