So? That, again, is not how the separation of powers works. The president cannot order an end to the filibuster. That is not something within his power set.
Only the senate can end the filibuster and only through a vote.
He may "lead the Democratic party," but he does not lead the senate and there is no reason that the senate Democrats have to do what he wants. I can only think you are very ignorant about the U.S. government or you would know that Sinema and Manchin would never have agreed to that.
I get it, you passed the civics course your football coach taught. There are many real powers politicians have that aren't written into bylaws. Trump still has the entire GOP by the balls despite being out for 3+ years, but Biden gets a pass for being unable to whip 2 senators.
Insulting me doesn't explain how Biden could end the filibuster when Manchin was dead set against it. Why do you think he could whip those two senators on ending the filibuster when he couldn't even do it to get his agenda passed without making huge concessions?
Do you think Trump gave a shit about the opinion of 1 senator or that his whip tells him what they're going to do with strategy? Do you think the whip has equal influence as the President in party leadership? Do you think any successful president has operated without heavy strategic coordination and oversight to Congressional leadership?
All of what you are saying is literally factual, but it's incomplete and naive to how party politics works. Biden is ineffective because he can't direct his own party. Blame Manchin, Sinema, or Houdini if you want, but an effective leader would have succeeded in bringing them in line.
So your example of Trump forcing the senate to do something they were against while president is an article about something that happened a year after he was president? I'm not even sure what the relevant part of that article is.