Anaplan requires any resource billing on an Anaplan project to have an active, current certification.
Project managers should understand the end-to-end Anaplan process, including model building, model design, and The Anaplan Way methodology.
I am a solution architect and yes it makes full sense for me that all staff should be following the Anaplan way training, because we are working as a team, project manager, solution architect and consulatnt, and all of us need to be skilled in the Anaplan Way.
And to tell you the truth, having been involved both in projects where all the team was aware about the Agile way of working and others projects where the team was not, I would rather have all the people follow the training Twice! Life is much more easier.