Hello guys I have one doubt My friend his E-Commerce site some customers purchase one product we want check weather they come direct from our website or else organic using search query how I find out what type of search query they come to our webiste to purchase product these details in GA 4

You have to have set up GA4 properly before the user made the purchase. When set up properly (setting up proper Events and flagging the right ones as Conversions), you can see the conversion path via the "Advertising" section on GA4