I think I see what they did. It's not very clear, to me at least, just looking at the screen. It shows IPv6 only at the top but, when you go to create a rule you can do dual or IPv6. So it's not just IPv6 even though that's what it shows at the top. I still wish there was an IPv4 option.
You can ask support to turn on IPv4 inbound rules for you rather than letting the system create them for you. It's not very common to do though unless you are also using NO-NAT.
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