Advanced integration with ACF – Advanced Custom Fields plugin. Search, show and filter with ACF plugin custom fields.
Please read this article to find the examples of code snippets to display ACF fields values.
Just use the Filter Results option. Set a new filter for product results and use ACF fields rule. Choose the needed field and value for it.
Sure. Inside Search in option you can enable custom fields search and also choose exactly what custom fields must be available for searching. This is working for both ACF fields and standard WordPress custom fields.
Download free version from wordpress.org repository.
Read about differences between free and pro versions here.