I believe the Episcopal Church and the larger Anglican Communion have formal relations with the various branches of Orthodoxy. Though many differences still separate us, we consider each other brothers and sisters in Christ.
However, in the Episcopal Church, any baptised Christian can receive the sacrament of Holy Communion...regardless of age or denomination. An Episcopalian or Anglican may not receive the sacrament in any Orthodox Church.
Heck I was invited to receive the sacrament in your let-us love-everyone-no-matter-how-vile sect JS, as a
godless one (I think maybe that outfit that hosted that fund raiser for Hagan got their name from reading my posts actually), and accepted.
I like ritual for its own sake. Belief is beside the point - for me.