Let's just go for line two of what you wrote:
Ro 10:9, 13 regarding
Joel 2:32 where Paul teaches
Jesus is the
YHWH of Joel's prophecy that "everyone who calls on the name of YHWH will be saved."
Romans 10:9 refers to believing in your heart that God raised Jesus from the dead. The one we are believing in and calling on the name of is YHWH. It's in the context between Romans 10:9,13
9that if you confess with your mouth, “Jesus is Lord,” and
believe in your heart that God raised Him from the dead, you will be saved.
11It is just as the Scripture says: “
Anyone who believes in Him will never be put to shame.”
12For there is no difference between Jew and Greek: The same Lord is Lord of all, and gives richly to all who call on Him,
13for,
“Everyone who calls on the name of the Lord will be saved.”