CSS in child theme not getting loaded

Parent vs Child Themes

get_template_directory_uri always refers to the parent theme you can verify this as you always should when things don’t load as expected by looking in the console in the browsers dev tools. These would show 404 errors for the CSS files, in the wrong folder.

Instead, use get_stylesheet_directory_uri, the stylesheet family of functions always refer to the current active theme

Duplicated Names

wp_enqueue_style( 'child-style', get_stylesheet_directory_uri() . '/style.css', array( $parent_style ), wp_get_theme()->get('Version'));
wp_enqueue_style( 'child-style', get_stylesheet_directory_uri() . '/css/bootstrap.css', array( $parent_style ), wp_get_theme()->get('Version'));

You can’t call 2 stylesheets the same thing and expect it to work, which is what you’ve done with all 4 of your stylesheets

Also notice that you’ve loaded bootstrap.css from both themes