Hello,
Please see screenshots – https://prnt.sc/ACUkYPWfXbNM > https://prnt.sc/xZ49azXKp54Q > https://prnt.sc/yTMC-i1cC0v3
Dashboard > Comments > delete Comments
WooCommerce > Settings > Products > Enable product reviews > off. Go to Products > select all products and click on edit > disable comments
Theme Options > WooCommerce > Shop > Tabs > Tabs Type > Disable
Regards