Congratulations on wasting 100 bucks on the ihost. For the love of God and all that is holy under the Sun please return the iHost if you can. Sonoff is a Chinese hardware company. Their SNZB series with P at the end is good bang for the buck thing. Simple, honest and easy to recommend, but their gateways are “meh” and the Ihost is atrocious.
Ihost was meant to run locally, so you bought the wrong thing for yourself in the first place.
Secondly, there is Matter Bridge feature, so you may want to expose local devices to Google Home through that. Try Tailscale if you want to access ihost securely over the internet.