WP Super Smush: Not Properly Optimized Images

Hello,
I'm getting a really low score on both site while using the WP Smush plugin on both sites I have it installed. I believe it's due to the Super Smush feature not working right. Previously, I noticed an option after smashing for a 'Super Smush' but even though it is selected I'm unable to do it. Can you please give me some advice.