Hi Creaks6 👋 Welcome to the community! Thank you for posting!
Sorry to hear you are having some issues with your Hub 3 Wi-Fi coverage, and that you are having issues with the connect app to support with these! If you could please run through the troubleshooting steps outlined here 👉 https://virg.in/wifisos and let us know how you get on?
It may also be worth having a look into your advanced hub settings 👉 How to set up Virgin Media broadband | Virgin Media Help. Some users split their Wi-Fi bands to optimise coverage on specific devices. You can read a bit more about this on the community thread here 👉 Solved: How do i split wifi on superhub 3 - Virgin Media Community - 4770521.
Let us know how you get on with these steps and we can offer further support if needed! Thank you for your patience in the meantime.
Wishing you all the best 🌞
Molly