Hi,
Due to the latest changes in the SharePoint Online API, it is no longer possible to configure custom columns from an app, unless the app runs under Full Control. As a result, we removed our custom column apps from the Office Store. But it's not a big deal, the apps are available from our site and can be installed through your Enterprise Catalog. The apps include:
You can still install each app separately, but if you truly looking for a comprehesive solution for your Microsoft 365 needs, install Ultimate Forms instead, one app that includes everything you will ever need to build top-of-the-line business solutions inside your SharePoint sites. Ultimate Forms includes all the columns and all the other components we have to offer in one convenient, integrated app.