Tasker can help you create tasks which basically run curl commands, and can be set up as buttons on the phone launcher.

Nah, even if it didnt have throughput issues it would be far more effort than necessary to set up.

My recomendation, get a used Linksys WRT1200AC and put openwrt on it. It’s basically as if they put a raspberry pi 3 into a linksys router, it has much more processing and memory than most cheap routers and you can get it used for about $50.