In my work we are in a lack of developers and the ones exists have no frontend experience. Therefore for my backoffice panel I need a cloud service that will offer a drag-n-drop solution with scratch-like behavior on the frotnend that will consume my API or lambdas for authentication and any other backend functionalities.

Do you have any idea how I can do this?

In another words I want a wix-like service for the frontend that will consume my API or a set of serverless functions/lambdas offering to me a Backoffice/Control Panel