No, Vivo Y36i does not offer any kind of IP rating and it is not waterproofed.
Vivo announced 1 major Android updates. So last update will be Android 14.
Vivo announced 2 years of security updates for Vivo Y36i, so it will receive patches approximately until 2025.
No, Vivo Y36i doesn't have Wi-Fi 6 version or newer.