Was going to comment something along the lines of “Inb4 someone posts that obscurity will keep you secure” but here you are. No, you won’t be secure just because it’s on IPv6. And TLS certs are open to the public, (they literally have to be, since any device attempting to access your server needs to be able to validate the cert) so bots will scrape them and instantly have whatever you made it for. So it wouldn’t even keep you obscure.