The migswitch will not allow you to run unsigned code, only clones of official cartridges. Get an old “unpatched” v1 switch or newer with a rp2040 modchip.
I have a poor man's version of tablet (Lenovo) and I don't have it rooted. You have to imagine that these tablets and smart phones are all over the map and average folks don't go through the hassle of rooting, let alone worry about block Ads. The experience then is really frustrated.