Question Animation rig not affecting model?

Hello, I'm trying to follow a procedural animation tutorial, but I keep getting stuck at setting up the rig. whenever I set up the constraints and assign them to parts of my character's legs, it just creates new bones at the origin and they don't affect the model:
Do you know what's going on? I'm using 2022.1.10f1

 

Update: As it turns out, the bones are affected, but only in play mode. While it is a relief to see it isn't broken, I don't want to have to keep entering play mode to see if the IK is working correctly.