And to not believe that Jesus’ body and blood are there for their reception is to not receive Christ himself nor his benefits. Like In John’s Gospel chapter 3:18, unbelief is condemnation already because one does not receive Christ and his benefits. Unbelievers do not get salvation, at that point of unbelief and non-reception of Christ’s body and blood.
So, in John 3:18, who is doing the judging (κρίνω)? The passive: "the one not believing already has been judged" is likely a divine passive, indicating that it is God who judges the unbeliever. That doesn't change my point that Christ is present in the sacrament. His promise is that "This is my body." By saying those words, God keeps his promise and is present in a special and tangible way in the sacrament.
God is passing judgment of condemnation upon one who refuses what God is giving here in the sacrament. Jesus is God. His word is truth and When he declares what he says in the Words of Institution of the sacrament of Holy Communion, Jesus’ words are what he says they are. The bread is his Body, etc. given for you. The benefits of reception are clear. Jesus does not speak to obfuscation here. By not receiving the person is an unbeliever and does not discern Jesus’ body. Instead of salvation the unbeliever is condemned at that point.
1 Corinthians 11:23 can be understood as God passing judgment on those who refused to share the meal with other believers. Paul's advice at the end of the paragraph was not, "Come to the proper understanding of Christ's real presence," but "wait for each other."
I think that we need to take just as seriously Paul's words about the sacrament in 1 Corinthians 10:
16 Isn’t the cup of blessing that we bless a sharing in the blood of Christ? Isn’t the loaf of bread that we break a sharing in the body of Christ? 17 Since there is one loaf of bread, we who are many are one body, because we all share the one loaf of bread. (CEB)
There is to be one loaf of bread and one cup. (There's nothing in scriptures about using individual wafers or cups.) Eating from the one loaf makes us one body; because, we, together, are sharing in Christ's body and blood. Perhaps if a community requires more than one loaf and one cup; it's become too large to be the type of body that is in communion with each other as they are in communion with Christ.