We cannot grant full compatibility with all themes available on the market. However, generally, if themes are developed according to WordPress and WooCommerce guidelines, YITH plugins are compatible with them.
On the other hand, we can grant full compatibility with YITH themes (Proteo and Wonder) because they are constantly updated and tested with our plugins. Sometimes, especially when new versions are released, it might only require some time for them to be all updated, but you can be sure that they will be tested and will be working in a few days.