Slow down page speed and php meomory

Hi Support-Team. If I enable the plugin, the page speed is very slow. Google page speed insight says on mobile: Plugin enabled: 38; Plugin disabled: 89.

I work with wp-rocket and I can’t enable mobile page cache, because the css of the cart are not shown correct on front page. For example, the icons are missing. please see the screen attached.

Another problem is that the plugin use a high capacity of my php memory.

Is there anything I can optimize?

Page is: https://nahrungsglueck.de

Thanks for help.

Sebastian