I'm fairly confident saying that you may be in error.
First, I couldn't find any rule change at all regarding hanging from the rim after a dunk in the linked rule changes that you provided.
Second, when I Googled the question. "can an ncaa player hang on to the rim after a dunk", the results from more than one source indicated that it's legal when it's done to prevent injury.
And perhaps also as long as it's not for an excessive length of time which could be interpreted as taunting.
"Hanging on the rim after a dunk is
not allowed unless a player is grabbing the rim to avoid injuring himself and/or land on another player.Mar 20, 2022"
It was clear that RJ Melendez's momentum forced him to hold onto the rim after his dunk, but it apparently wasn't that clear to the officials.
sports.yahoo.com
Can you hang on the rim after a dunk?
Players are not allowed to pull themselves up on the rim, nor are they allowed to hang on the rim after a dunk attempt, unless they are doing so to avoid injury to themselves or another player.”
See the text listed under the heading "Technical Fouls for Hanging onto the rim" on the page below:
www.rookieroad.com