I’m migrating from GeoServer, and I noticed that my client was using the Importer BDB Backend plugin. I tried to download it to install version 2.27.2 and realized it hasn’t been available in the repository (Sourceforge) since at least version 2.26.x (I haven’t looked further into other versions).
I’d like to know if it really no longer exists, and if it doesn’t, my suggestion is that it be removed from the Extensions page.