Kiwix, ObjectBox and NonFreeComp antifeatures on IzzyOnDroid web page?

Related to #883 (closed), I'm looking at IzzyOnDroid Kiwix page at https://apt.izzysoft.de/fdroid/index/apk/org.kiwix.kiwixmobile.standalone

But I am confused:

• on the one hand, list of libraries list ObjectBox, which, if I'm understanding the whole Kiwix thread, has blob of proprietary non-free software, so it (IIUC) should be marked with NonFreeComp antifeature?
• but the web does not seem to list any antifeature for Kiwix package? Is that an omission, or has ObjectBox have somehow cleared of that binary blob?

I see other apps (e.g. https://apt.izzysoft.de/fdroid/index/apk/com.nagopy.android.aplin) showing that NonFreeComp antifeature banner prominently, so that AF should be supported, but why is Kiwix not having it?