When you start the TAPP tool, this tool starts a webserver on your computer which is not only accessible on localhost, but (if you set the firewall settings correctly) also from other computers in your network. In my case I used my Android tablet.
I start the TAPP tool on my laptop. And then I opened the control webpage in the Chrome browser on my Android tablet. In my example video I changed the filter settings of the 303 plugin. I noticed that there is quite a delay sometimes until the value changes reach the tbd. This happened when I slowly changed the values of the sliders. Lifting my finger an then clicking on the target value changed the parameters immediately.
So it may be a limitation that you can only access two parameters with the potentiometers and change two parameter via CV IN 1 and CV IN 2 directly. But using a device with a touchscreen gives you a lot of control and flexibility.