Not true. Acts 20:7 tells us Paul and the Christians gathered together to break bread on the first day of the week. This long predated the Roman Catholic Church.
Thanks. I thought of that verse as soon as I saw that strawman argument, but couldn’t recall the reference.
The term “breaking bread” does not signify a Sabbath specifically.
The Bible uses the expression “breaking of bread” in different ways. First, Acts 2:42-46 describes the early church breaking bread as part of their fellowship: “And they continued steadfastly in the apostles’ doctrine and fellowship, in the breaking of bread, and in prayers.” The early Christians came together regularly for common meals, which included the breaking of bread. Acts 2:44 refers to them having “everything in common,” and this no doubt included sharing meals together, each one receiving from the others what they needed. Verse 46 describes them breaking bread in their homes.