The only debate I have been referring to is the one about the mode of baptism.
Most that you have said regarding the meaning of it, I would agree with.
I look in the texts that you present not just for possible suggestions that it may be full immersion, but for absolute proof.
If full immersion deserves the firm place it now holds in church doctrine, it must be clearly taught in the Bible.
If not, there is more for us to learn about the meaning of baptism, ie from the Old Testament.
That does not make what we already know from the NT un-true.
I imagine that you envisage them going under the water.
The Jordan, being the lowest river in the world (
https://www.guinnessworldrecords.com/world-records/114422-lowest-river), is however in most places a river that you would need to "go down" to.
In any case only one of them would need to go under to be immersed.
Not enough here to close the debate.
Again I am guessing you see Jesus coming up from under the water?
But how can we be sure from this text that it was really like that?
There are also those who think that they have found the full immersion mode in Romans 6:4 "Therefore we are buried with him by baptism into death".
This is found in a passage about union with Christ, including with His death, but I do not believe it clarifies for us what the mode of water baptism is to be.
Jesus' physical burial was not under the ground, but could be better compared to being shut in a room.
There are those who think that "one baptism" in Ephesians 4:5 means that every use of a "baptiso" word form in the Bible is a reference to full immersion water baptism.
This is not the case in the Bible.
There is more for us to understand than the baptism of John (Acts 18:25).
Jesus calls His coming trials in Mathew 20:22 a baptism.
Romans 6:4 refers to baptism in the context of union with Christ in His death.
There is also baptism with the Holy Ghost (Mark 1:8), and "he shall baptize you with the Holy Ghost, and with fire" Mathew 3:11.
"Bapso" is used in reference to dipping bread, ie john 13:26, and "baptosmos" is used in reference to ceremonial washings in Hebrews 9:10.
We should not be more dogmatic than the Bible is about the use of the word.