URGENT: Cannot access Plug Ins section in Safari settings when trying to set up Flash Player

Hi, 

Following, 

https://helpx.adobe.com/in/flash-player/kb/enabling-flash-player-safari.html#later-macOS-versions#sa_src=web-messaging

I cannot see 'Plug ins' below the 'Notifications' section in Preferences. Can someone please urgently help me with this? I have cleared my caches/history.

Thanks!