Technically, it's much more than that, and there is even strong evidence that the bread used at the Last Supper was ordinary every day bread, and not unleavened bread, based on the Greek words used:
The word for unleavened bread in Greek is AZYMOS it is used in the Greek New Testament nine times: Mt.26:17; Mk.14:1,12; Lk.22:1,7;Ac.12:3; 20:6; 1Cor.5:7,8.
The word for leavened bread is ARTOS it is used 97 times in the Greek New Testament.
Matthew 26:26 (In Greek)
26:26 ἐσθιόντων δὲ αὐτῶν λαβὼν ὁ Ἰησοῦς *ἄρτον* καὶ εὐλογήσας ἔκλασενκαὶ δοὺς τοῖς μαθηταῖς εἶπεν λάβετε φάγετε τοῦτό ἐστιν τὸ σῶμά μου
Eucharistic Bread: Leavened or Unleavened? · Preachers Institute
In all these places, the writers
never say Jesus took AZYMOS and blessed it, they write that Jesus took ARTOS, common ordinary leavened bread.
The use of unleavened bread in the Catholic church didn't start until the 9th century.