Don't bother trying to free the EGR, just blank it tbh.
If you had a big boost leak, there wouldn't be much power at the top end. Could be a small boost leak though, most have them these days. The inlet elbow is on the right hand side on top behind the engine, you should be able to see oil around the join there. As for the boost pipes, there is only one, its black plastic and hidden deep behind the engine, there is a silicone joiner each end of the plastic pipe, and they can leak.
If you had a big boost leak, there wouldn't be much power at the top end. Could be a small boost leak though, most have them these days. The inlet elbow is on the right hand side on top behind the engine, you should be able to see oil around the join there. As for the boost pipes, there is only one, its black plastic and hidden deep behind the engine, there is a silicone joiner each end of the plastic pipe, and they can leak.