What Biden has done is to cut the issuance of drilling leases to the minimum required by law, pass the Inflation Reduction Act, enact a regulation to force vehicle electrification, and similarly force fossil fuels out of most power plants.
What Biden has not done: stop issuing drilling permits or impose export restrictions on fossil fuels. The former has some serious limits because of how the courts treat the right to drill as a property right once you hold a drilling lease, and the latter is simply untested.
Well for one, no. Biden was not a Senator while Trump was president… But giving you the benefit of the doubt that you meant his Senate career prior to being VP.
Found some stuff on google: https://www.politifact.com/factchecks/2019/may/08/joe-biden/was-joe-biden-climate-change-pioneer-congress-hist/
And this site claims, over his 40+ year Senate career, that he made a pro-environmental vote 83% of the time: https://scorecard.lcv.org/moc/joe-biden.
Yes, League of Conservative Voters… But I don’t know that necessarily means it’s wrong. They’ve got all the votes there so I guess you can check yourself.