@Harold What any individual Christian believes is up to that person, of course, and many people are ignorant of the official doctrines held by the denominations to which they belong. But while Catholic and Protestant laity alike may see the Eucharist as ultimately metaphorical, the majority of churches hold to some form of the real presence doctrine (of which transubstantiation, consubstantiation, and sacramental union are all versions).
Transubstantiation says that the fundamental substances of the bread and wine are transformed into the fundamental substances of Jesus’ body and blood (there is always one substance present in each, but what it is changes due to the sacrament).
Consubstantiation says that the fundamental substances of the bread and wine remain and become co-located with the fundamental substances of Jesus’ body and blood (there is at first one substance present in each, but a second comes into existence alongside it due to the sacrament).
Sacramental union says that the presence of the body and blood of Christ is not a matter of the metaphysics of substance at all, but rather that body and bread, as well as blood and wine, are united due to the sacrament in the same way that body and soul are united in a person by God (despite being neither one single thing nor co-located).
While there are views on the real presence of Christ other than these, note that each of the positions described here (and most of the positions I’ve left out) do hold that the body and blood of Jesus Christ are truly present and consumed during the Eucharist. I am not claiming that all denominations hold such a view, but it is certainly not restricted to Catholics.