In OPEC+, the plus is for Russia, not the US. Russia has been directly coordinating with OPEC on market supply matters.

The US oil producers don't coordinate well with OPEC. It has been an ongoing problem that OPEC has been endlessly complaining about for many years.

Ah, I guess I misread that. Some article talked about how we were able to coordinate on the reduction even though congress had some moratorium on negotiating with OPEC, and I thought it was through that technicality and that OPEC+ was created specifically to work around it.