RE: Theme Adventure works tile-list module
Hi Atiq,
In that case it's as simple as using the e-commerce online SDK to make any CSS modifications you like. The following document discusses how to make changes to a module library module.
docs.microsoft.com/.../modules-overview
Since these are standard React components, you should be able to change the SCSS in your theme for the particular module you want to modify, the document also covers how to make more/deeper changes to a module using a view extension or if drastic changes are needed including business logic by cloning the module.
Since your module requirements are specific to client, you'll need to figure out the appropriate CSS/html changes needed per your specific design.
Thanks,
Sam