The Hyvä theme is a brand new theme for Magento that offers a separate front end from Magento's own. Please visit the link to get more information on it.
By default, Klevu is compatible with Hyvä, but we recommend reviewing these points while using it:
Quick Search Input Selector
If the website is already using Klevu and the theme is switched to Hyvä, the Quick Search Input Selector setting must be updated. To make changes, please go to admin > Stores > Configuration > Klevu > Search Configuration > Developer Settings > Quick Search Input Selector and change it to input[type=text][name=q],input[type=search][name=q]
Lazy-Load JSv2 Theme Scripts
Klevu provides the option to lazy-load our theme scripts. Please follow the link for more information.
Minimum Height for Product Results Content
Using this guide, you can reduce the Cumulative Layout Shift score on your page. Please follow the link for more information.