Set your Instant Pot to "Saute"
Add olive oil to coat the bottom (2-3 tablespoons should do it). Add more if you need it.
Add <g class="gr_ gr_130 gr-alert gr_spell gr_run_anim ContextualSpelling ins-del multiReplace" id="130" data-gr-id="130">mirapoix</g> (carrots, celery, and onions) and cut up chicken breast.
Cook until the chicken is no longer pink
Shut off on your Instant Pot.
Add everything BUT the kale to your Instant Pot.
Seal your lid and set the knob to sealing.
Set it to high pressure for 8 minutes.
When it's done, let it do a natural pressure for 10-15 minutes (ie. turn it off and don't touch it).
Release the vent so any steam goes out.
Open your Instant Pot and add your baby kale.
Close the lid and lock it. Set it for another minute on high pressure.
Do a quick release (release the vent when it's done and watch out for the steam).