Press "saute' on your Instant Pot. Add in the oil or butter, and toss in the onion.
Stir the onion for a few minutes to soften, then add the broken spaghetti pieces to brown slightly, several minutes.
Add all the rice, seasoning mix, and chicken, stirring to combine.
Let cook for a few minutes, stirring periodically.
Pour in the bone broth or chicken broth, stirring gently. If any rice kernels are on the side of the insert, shove them back in! Hit the 'cancel' button.
Lock on the lid and set 'manual' time for 5 minutes.
When the Instant Pot beeps, hit cancel, and let the it sit for 5-10 minutes before releasing pressure to serve (it may have naturally released by this point anyways!)