“The trachea is more anterior, I don’t see why pressing the posterior of the neck should occlude one’s airway or it should impact circulation to the brain”
I dont really understand your question.
The entire neck is compressible, Chauvin had Floyd’s neck pressed against the soldi ground
This would absolutely be expected to constrict the airway whether constricted anterior or posteriorly if it is held against a fixed surface (the ground)