Isn’t exposing your internal domains and systems outside VPN-gated access a risk? My understanding is this means internaltool.faang.com should now be publicly accessible.
buganizer.corp.google.com is an alias for uberproxy.l.google.com.
uberproxy.l.google.com has address 142.250.141.129
uberproxy.l.google.com has IPv6 address 2607:f8b0:4023:c0b::81
Google's corp services are publicly accessible in that sense - but you're not getting through the proxy without valid credentials and (in most cases) device identity verification.