can i use a 4G sim card on the iphone 13 pro?

Hi. So I’ve been thinking of getting an iphone 13 Pro for my carrier straighttalk. Currently my place of work does not sell the ones specifically meant for Straighttalk but we do sell the sim out/unlocked ones. If I were to get the sim kit for Straighttalk (4G sims) would it still work on the iphone 13 Pro even though it’s a 5G phone?