Remove membrane from ribs (instructions above in post) for very tender ribs. Then place inside your Ninja Foodi with the meat side facing the sides of the pot, wrapped around. See photo above in post.
Pour bottle of barbecue sauce on ribs and into pot. Then add apple cider. Make sure ribs have bbq sauce on them, can spoon over.
Close pressure cooker lid, one that isn't attached, and close steam valve.
Turn pot on, then press pressure button. Set to high for 30 minutes (timing is good for 3-4 lbs of ribs to completely fall off the bone). Allow to naturally release steam for 5 minutes at end, then release remaining steam.
If you want to make outside cripsy then gently cut rack of ribs into 3-4 equal pieces.
Gently lift out and on to a plate (they will want to completely fall apart so handle with care).
Pour sauce from pot into a bowl and rinse out inner pot if desired. (you can leave as is but sauce will get more stuck on during the air frying process if you don't wash off now)
Place rack into pot upside down so rack is lower to the bottom and ribs will fit with lid closed.
If you want really crispy ribs only place 2 pieces of ribs in at a time on to rack. Pour a bit of sauce from pot, or more bbq sauce from another jar on top of each piece and close air fryer lid (lid that is attached).
Set to air crisp, 400 degrees for 8-10 minutes. Check and if you want them crispier then add a few more minutes. Remove and add other racks the same way to crisp outside.