It’s a massive oversight on the part of TC, who have been made aware long ago by consumers that it would be us full functionality to have. There’s no real excuse for it as far as I’m concerned - other than the fact the iPhone/Android app is quite crippled functionality-wise compared to the iPad/PC/Mac versions, but it’s surely something TC could add.
In contrast, Source Audio have nailed their mobile app. You can edit all parameters directly on your phone (there’s a lot!) as well as share your patches with the outside world easily. It’s just a shame they don’t make a compressor as I’m sure it would have the potential to be a TC killer!
That said, I do love my spectracomp.