I requested something like this back in 12/2023 suggesting it could perhaps be part of the Chord mode. Back then I had pointed to the Polyend Play as inspiration for this feature. The Play and Play+ were updated with MIDI Perform mode which looks very similar to the function of Perform mode on the Polyend Tracker.
At the time, I received a response from Squarp stating they had more ideas in line for the Chord mode. I have hope things are still in the works regarding this.
Here’s a link to that thread and a couple others making this request over the past few years:
Here’s a link to the basic function of MIDI Performance mode on the Polyend Play:
If you have ideas, questions, feature requests- be sure to contact Squarp via their request form. They don’t always read all posts on this forum, but are very receptive and responsive to communication via the contact form.