Just like every other high level complex negotiation that takes place, I think the actual details and work of the deal were delegated to lower level administrators, bureaucrats and negotiators. You know, the people who are paid to do so. The President's role is to put the team in place and then sign off on or decline the deals placed on the table and deal with the PR backlash and/or receive the PR glow. Biden wasn't burning the midnight oil doing some three-way negotiation between Putin and Scholz. That's how it happens in the movies, not real life. Germany and Slovenia (trust me
) didn't give up their chips out of some personal favor to Biden, they did it because they were leveraged and enticed by whatever the the United States' actual full offer was.