This SaaS was built using a platform called "ConcreteCMS." It is a relatively rare content management system, and the client wants to maintain consistency with a specific theme they like. Therefore, the new layout needs to be aligned with this theme.
A Figma design alone will not suffice, the client also requires an HTML version, which will likely need to be converted into "ConcreteCMS" blocks to build the layout within that system.
It requires someone with expertise in that specific CMS and significant frontend experience, particularly with JavaScript, HTML, and CSS. Customizing a specific theme for a rare CMS.