According to Joel 2:32, who will be saved?

Answer: All who call on the LORD's name

"Everyone who calls on the name of the LORD will be saved" (KJV: "delivered"); there will be deliverance on Mount Zion and in Jerusalem.

“And everyone who calls on the name of the LORD will be saved; for on Mount Zion and in Jerusalem there will be deliverance, as the LORD has promised, among the remnant called by the LORD.”— Joel 2:32 (BSB)