slaaced ipv6 addresses are pretty hard to scan, because scanning /64 host-space takes forever to scan
"IPv4[..]8 bits reserved for host addressing[..]5 minutes[..]IPv6[..]64 bits reserved for host addressing[..]5 billion years to complete"
https://arxiv.org/pdf/2105.02710
but if you manually give your ioT devies static (scope:global) addresses, scaning gets pretty easy..
you better make sure your internet-of-shit devices aren't accessible with default logins from the internet..