Can't select IK bones

Good day,

I hope you are doing well. I am trying to modify an animation, but can't seem to select the IK bones. I have no problem selecting the FK bones, but they only allow rotation, and I need to move the arm position. Is there anything I need to watch out for when setting up IK, or is there anything I am missing?

My hands and feet auto-detect when setting up IK, but "Pole Target" auto selects and my target rotation is set to "IK handle". When watching the tutorial, "Pole Target" is not selected and target rotation is set to "FK Rig". I have tried playing with the settings, but they don't make a difference. The Unity Move/Rotation widget simply doesn't appear when clicking on any IK bone, but as stated, works as expected when selecting an FK bone.