I'm using touchOSC and Osculator on my iPad.
Which plugins do you know of (RTAS or AAX) that have OSC or MIDI control functionality inbuilt by the manufacturer? I'm not talking so much about Instruments, more FX --- EQ \ Reverbs \ Delays \ Etc.
The ones I know about so far
-Fab Filter plugins (which are pretty cool) https://www.fabfilter.com/
-Blue Cat Audio https://www.bluecataudio.com/Products/Bundle_AllPluginsPack/