It's not a Control4 issue. The pandemic created an insane worldwide increase on demand of tablets due to remote learning for the kids. This demand on tablets was bigger than what LCD screen manufacturers could produce. I'm sure LCD manufacturers are busy 24/7 producing screens for the big players leaving smaller companies like Control4 struggling to get supply.
And to elaborate on the programming off of your security system - you can use motion sensors from your security system to triggger lights in C4. Same with door sensors, window sensors, etc. That can be very useful.