I have used only core PHP for my project. One of the requirements is and this only for this specific URL

The URL which the client will send is this

https://example.com/product/4A08A923

Actually, this file was supplied in this URL on my server-side as below

https://example.com/product.php?id=4A08A923

Now using .htaccess when the customer sends a request via this specific URL

https://example.com/product/4A08A923

How can redirect the above URL to this

https://example.com/product.php?id=4A08A923

Any insight will be greatly appreciated. Thanks