Concerns about legato and polyphonic aftertouch

Hello, thee are a few synth apps that have polyphonic aftertouch, and I want to use that for IAA MIDI. Does Cubasis have polyphonic aftertouch support? Also, there are some legato patches I made on WaveGenerator that won’t work with the MIDI sequencer. If I record an AUv3 instrument like WaveGenerator in monophonic legato mode, the sequencer won’t use legato or portamento. It works in ModStep, but not Cubasis. The only ways I can use polyphonic aftertouch and legato in Cubasis are by recording through IAA.