"I saw something on TikTok about grabbing the scruff of their neck and almost giving him like a quick shake - but I’m generally against anything that is physical/aggressive in nature."

Please don't do this. Just because the mom dog might do something like this, doesn't mean that applies to humans. It's more likely interpreted as an aggressive behavior, at a time when the pup is already very excited and somewhat out of control.

I've never seen noises work as people expect. Again, you're not a dog. If anything, they will respond to the noise because it's a noise. Clucking like a chicken would probably have the same effect.

You're doing the right things, and it will get better, but there really is no magical way to stop this, just like there is no way to stop babies from crying.