DataTables's CSS is highly customized in sass/vendors/plugins/_datatables.scssSCSS file in order to use it as a native component within the design system. The SCSS code is compiled into assets/plugins/global/plugins.bundle.cssand globally included in all pages.
DataTable's global settings are configured in src/js/vendors/plugins/datatables.init.jsand this initialization code is bundled within assets/plugins/custom/datatables/datatables.bundle.js.