https://www.ads-software.com/support/theme/shamrock/

The problem is that there’s a few places where get_stylesheet_directory_uri() is used which assumes that the files will be pulled from whatever the current theme is ( in this case your child theme ) but that may not necessarily be the case.

For example:

shamrock\include\options\core\class-kirki-init.php

Sets a class URL by get_stylesheet_directory_uri() but references it in many of the enqueue hooks as a path to the parent theme. They should be using get_template_directory_uri() instead, which will return URL specifically for the parent theme.

We can see Kirki::$url is used many times throughout the theme, lots of enqueues in

shamrock\include\options\controls\php\class-kirki-control-base.php

You can copy the entire assets directory into your child theme which may fix some issue but as a whole this issue lies with the theme developer for them to push an update for.