There seems to be audio sampled (zoom in to confirm), hold Function + Yes to preview - no audio coming? Check main out cabling, mixer/daw, monitors etc.
If you go to a track, assigned a flex machine, you can play the recorder buffer (double tap track button and scroll with the level encoder up - slots 1-8 are your recorder buffers, select the one used for sampling) - or you can save the sample in audio editor (Effect 2 button brings you there within the audio editor) and load it directly onto a slot to play it with a flex machine.
Make sure your amp envelope is set long enough (set amp hold in sequencer steps for how long you want playback + a little release), if you don’t want timestretch, deactivate that.
Put a trig on the track to trigger either playback of the recorder buffer or of the sample.