It seems like it’s cleared up, but Catholics don’t (and have never) believed that the taste, appearance, texture, or even chemical composition change. Even though all those things stay the same, we believe that it is no longer truly bread but that it is Christ. Christ is fully (and not just spiritually) present in his body, blood, soul, and divinity in each particle. It’s not that Christ’s bicep is over here and his calf over there, or that Christ is broken or harmed or divided during consumption of the Eucharist. It’s simply him. What it appears to be is unchanged, but what it truly is is changed. I’ve heard some scholars say that the glory of Christ’s presence in the Eucharist is the same as Christ’s glory will be when he returns at the end times, regardless of what we perceive. He is that physically there in Communion. It’s not just a symbol. It’s not just a spiritual presence. His presence is as real and present and physical in the Eucharist as it was to the disciples he physically appeared to after his resurrection (or before, even, as present as those who walked and talked with him across Galilee and Judea).