How to hide plugin/ theme details to public in WordPress

Hey I am using wordpress for one of the client, and he is having a product which is USP for him and the whole website is built on wordpress, so his concerns are that some website like this website https://wpdetector.com/ it detects all the plugins and themes being used in the mentioned website. My question is how we as a company can hide these details from websites like these, If we are able to hide all the details then it would be very great else we would like to hide as much as we want. Kindly answer this query of mine.