Either cut the squash into 2 halves or cut into thin slices. If you are doing slices try to get them as evenly as you can, knowing that you can work in batches if you have smaller and bigger slices.
Set the squash into the basket of your air fryer with the cut side up. Drizzle with olive oil. Season with salt and any other seasonings you like.
Cook at 400 degrees for 15-20 minutes or until browned and the flesh is easily pierced by a fork.
Enjoy right away.
If making halves you can save them to use in recipes like soup.
Notes
Here are some suggestions for additional seasonings you could use.