I think nearly any species will bite a bit those paper plates if you use them to serve their food.... depending on how big your colony is, the plates will disappear (or not).
...I can only tell you, I use a mixed Pycnoscelus spp. colony for blatti-composting, and they are crazy eaters 😄 I'm a little careless with them and occasionally throw used food napkins in and they just eat it all (slower than real food, but they still eat it...).
Maybe you could grind these dishes with real food? I think that would accelerate their consumption, provide a lot of fiber and I guess wouldn't be toxic for them... 😉