Often, it is. Joel 2:
Romans 10:
G2962 occurs 722 times. Not every time it refers to YHWH.
Brenton Septuagint Translation:32a everyone who calls on the name of the LORD [H3068 Yahweh] will be saved;
Conventionally, H3068 is translated as G2962.And it shall come to pass that whosoever shall call on the name of the Lord [G2962 κυρίου] shall be saved
Romans 10:
This is the same Greek word corresponding to the OT Hebrew word for YHWH. In a sense, it says "Jesus is Yahweh". Not convinced? More contextual evidence follows:9 If you declare with your mouth, “Jesus is Lord [G2962]”.
The OT YHWH is the same Lord of the Gentiles.12 For there is no difference between Jew and Gentile—the same Lord [G2962]
Paul directly linked Joel 2:32's YHWH to Romans 10:9a's "Jesus is Lord". The evidence and linkage are strong. In Paul's mind, they were the same in the context of Romans 10:13.is Lord of all and richly blesses all who call on him, 13for, “Everyone who calls on the name of the Lord [G2962] will be saved.”
G2962 occurs 722 times. Not every time it refers to YHWH.