I have an Android tablet with an OTG adapter and USB hub. My backup camera control unit, dash cam, an older android phone used for storage and apps, and my aftermarket engine monitor all connect to the hub that connects to the tablet. My TPMS and refrigerator temp sensor are all Bluetooth connected to that tablet. The mapping, travel planning, and all the other needs apps are on the tablet.
Basically I created a central display and controller on the dash. It's customizable as to what I see and how. I can switch to various other displays with a touch of the screen. For the most part, I keep a split display the backup cameras and current travel map. All others are just icons along the edge. If I need to see something else, just press the icon to popup that Info and press again to bring back the main screen. I do have it so that if an attention issue occurs (like the TPMS alarm) the icon flashes red. And yes, the sounds are on so all alarm/alerts are heard.
One word of caution, make sure the tablet is large enough to create a readable experience, the you keep the in-use display other icons to a minimum so you're not clogging or squishing the needed display from excess icons or displays, the USB connected devices need to be non-usb powered as the tablet just can't support those power hog devices, and that the tablet itself can take the traveling environment.