use virt manager if you don’t want to mess around with settings; bare qemu-system-* if you have a bunch of patience

can’t you already do that? by clicking on the “new chat button” and pasting the phone number i can start the chat without adding to contacts; at least on whatsapp business that works

Get a cheap computer and connect the tv to it; get a mouse and bluetooth keyboard or an air mouse if your want to; install kodi perhaps, or just have your bare desktop. Problem solved

Disconnect the tv to wifi too.