Genesis 12:7 mentions Abram’s commemoration of the “Lord’s visit” (at least this is the wording of the NLT) in the form of an altar. This little event in the life of one of our spiritual forbears seems significant: that Abram recognized the coming-down of YHVH and did something tangible to acknowledge it is an example for us. Later, Abram was at the same place and worshipped the Lord again there.
I think there is more to commemoration of spiritually significant events than your garden-variety observance of the “Lord’s Supper” would seem to imply.
Mind you, I still can’t stomach the notions of consubstantiation or transubstantiation, but I do wish there were more sense of “presence” in communion.