How do I customise product pages

I am quite new to theme development.

I have created a child theme to work alongside storefront and am struggling to customise the layout of the individual product pages.

Under single-product.php I was expecting to see html markup that I could manipulate but actually what is declared is this:

wc_get_template_part( ‘content’, ‘single-product’ );

With no access to the actual code

Similarly, with my search bar, I need to add code to the individual product search results. But in search.php the following is declared:

get_template_part( ‘loop’ );

Again, forcing me to use JS and CSS to manipulate the appearance as best I can.