The Super Wi-Fi Booster works in sync with your Vodafone Router to create a 'Mesh Network' in your home and it's all done on placement and signal strength between your router, booster and your connected devices. The booster will mirror the name and settings of your router and devices will connect to the booster if it's lacking signal from your router. It'll connect to the booster like it's your router. It's essentially repeating the signal. So you don't need to connect to the booster like it's a separate network from your router as they work together to spread signal throughout your home.
Though saying that, within the Vodafone Broadband App you should see devices connected to the booster within the network map so not sure why that's not showing. When you set up the booster the app guides you through to the correct placement of the booster and if it's too close to your router you're defeating the object of it as it'll be giving the same signal strength to your devices as the router does as it's based on proximity. So if it's too close to your router, rethink the placement of it and move it further away from your router.
In terms of your Sky Q Mini Box - they are themselves repeaters/boosters like your Vodafone one and can repeat a broadband signal (at least it does if you're a Sky Broadband customer and I can't say if it repeats a signal from another provider, though common sense says that it should). So they could both be fighting to do the same job.
My advice is to rethink your home set up of your network. If your router is in one room at the access point / telephone line, have your Vodafone booster in a room opposite. If I'm right in saying your Sky Q Mini Box is repeating your signal, leave that in place and keep your booster away from it.
