Tried everything. Can't select bones in weight painting mode I've tried doing the select armature in pose mode switch to object mode then weight paint thing but it still doesn't allow me to select bones among a plethora of other solutions and I'm not sure why but for some reason it just doesn't work for me. Can anyone help me figure out what I'm doing wrong?
https://drive.google.com/file/d/1neePPk9PlKjhpp8AIbUOF94m1KHws7hX/view?usp=sharing
top menu Edit &gt; Lock Object Modes &gt; uncheck

Then you can select multiple items when in edit mode.
Set your mesh to weight paint while your rig is in pose mode.