I am more interested in where do you find the s/n in the traffic? I couldn’t identify it, by a short test.
Except I’m in the admin panel, because it is not httpS://, for given reasons. And if the device itself won’t provide httpS:// only, I would not dig deeper in overcompensating ‘security’.

My Beryl does exactly what I’ve paid for. Providing a more secure ‘private’ network in my RV. I wouldn’t send confidential government documents on this line, but it is enough for checking emails and do amazon shoping.