Hello Thomas,
Thank you fr reaching out and I am happy to assist you with this.
To exclude pages from being cached, add the page to Performance>Page Cache>Advanced>”Never Cache following Pages” field, for example:
/cart/
/checkout/
To exclude specific JS or CSS from being minified, go to Performance>Minify>Advanced>Never Minify following CSS files (or Never Minify following js files ) and add the path of the file, for example:
/wp-content/plugins/klarna-checkout-for-woocommerce/assets/js/klarna-checkout-for-woocommerce.min.js
Please note that you should exclude files from being minified only if Minify option is enabled in Perfomrance>General settings.
Thanks!