On the NCOER of a PSG, can they list the accomplishments of subordinates that they facilitated (e.g. college, train up for EFMB/EIB, etc.)?

I don't see a problem with that as long as the PSG's actions influenced the soldier's ability to achieve those accomplishments.
The sergeant that worked after the duty day to make sure that all the soldiers obtained a fitness level that resulted in the entire platoon passing with better then 70% average.
The sergeant that stayed on top of the platoons readiness ensuring that all members maintained green status and moved through the STEP system in a timely manner.
The sergeant with minimal maintenance deficiencies on platoon equipment due to establishing a platoon culture that took equipment PMCS seriously.

Those, in my opinion, are fair accomplishments that could be used as bullets.

I am not sure about individual accomplishments, and generally I would say no. However, if all her soldiers made commandant's list at their respective NCOES, that might reflect on the PSG as well.

Supervisors can take credit for subordinate's accomplishments if they directly supervised or facilitated the work and in doing so demonstrated management or leadership. For example (Air Force language):" Under SSgt Smith's leadership, 85% of his flight completed [whatever] certification in 4 months or less; 20% more than any other flight in the Squadron and exceeded Support Group Commander's goals by 30%."

Leaders are usually rated on the performance of their units. For example saying a PSG or PLT LDR scoring a max PT test is fine, but they are really evaluated by the scores of their soldiers. Earn g an EIB is great, but having a high pass rate for the platoon is the mark of leadership.