Ended up doing this one, which fits the RBS20 perfectly. I’ve since changed to Eero (made WiFi calling stable when roaming nodes) and it fits the eero pro and cupcakes too.
We put an Orbi satellite into a weatherproof box and mounted it to our home’s exterior wall under the eaves. The benefit over the outdoor Orbi satellite is that it can be on a wired backhaul. I plugged it into a outlet that has a smart switch on it, so that allows me to turn it on and off with various scenes or when the temps get too hot. These boxes are available on Amazon for about $20 in all sorts of form factors - this one fits the RBS20 satellite pretty snug : Outdoor junction box
Not worth the price. Use something like this..