Rare here but I’ll try and find one

I’m already burnt out. Womp womp

I didn’t get that

It can and has already happened. You can make your own root ca. Internal domains need internal root cas. Is it a pia to setup yes. Do I have it installed on my unrooted android phone and linux computers? Yes.

Edit: I didn’t see the dhcp part. But you can still make your own root ca

You can do this, I already use .internal and you can male your own root ca and make your own certificates with that