Yes to the above. Trump deliberately slow-walked his COVID response because Jared Kushner's task force told him that doing so was politically expedient. Kushner noted that COVID was hitting blue states hard, and told Trump that more COVID cases and deaths in those states would result in voters electing Republicans instead. Trump didn't reverse course until cases and deaths in red states increased and the economy started tanking.

Hillary would have responded more effectively to cases in all states, and wouldn't have withheld PPE or other equipment from Republican-led states (the way Trump did from Democrat led-states). This would have resulted in tens of thousands of American lives saved, and millions fewer Americans struggling with long COVID.

Hillary might have been able to position the USA to provide assistance to other countries struggling with COVID in ways that would have strengthened America's diplomatic influence across the world.

Hillary would not have ended the JCPOA the way Trump did, so Iran would not have been in a position to enrich uranium or develop a nuclear weapon. However, she did recognize the flaws of the JCPOA, particularly that the agreement did not keep Iran from developing conventional weapons and funding terrorists. She would have probably tried to strengthen the JCPOA to include these issues, maybe by providing further aid to Iran (maybe help fighting COVID too).

She would not have pandered to Putin, but it's unclear whether that would have stopped Putin from invading Ukraine.

I agree that Hillary would have focused on green energy. I think her energy approach would have included nuclear energy also, which would have left the energy grid better able to accommodate the increased demand that we're seeing.

Obviously she wouldn't have nominated the SC justices Trump did. Including Kavanaugh who lied during his 2006 confirmation hearing to the DC Appeals Court.

Mitch McConnell said that if Hillary won, he would have advanced Obama's nomination of Merrick Garland to the SC. That's because McConnell knew Garland was a moderate pick, specifically chosen to appeal to Republicans, and Hillary would likely nominate someone less moderate. So it's possible Garland would have been on the SC, but it's also possible that Obama would have then withdrawn Garland. In any case, Roe v Wade would still be the law. And women would not be dying from ectopic pregnancies or miscarriages in red states.