how now to set ibus (Intelligent Pinyin) font size?

When trying to enter Chinese characters into text via ibus in (g)vim, LibreOffice, etc., ibus's menu of candidate characters uses a font size that is too small (see attached screen capture), and does not match the setting in ibus's preferences.  This issue came up before, in the winter of 2019; see this thread: "https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org/thread/JZEWPXT776ZKKFXECXUGYU7N4XJ4QPHQ/#UGWUQVLSLJUKQZRAW45LTMEV3J546GOC" I read through the thread and checked/did what Ed Greshko and Peng Wu suggested.  I get a message that "gnome-shell-extension-prefs is deprecated".  Something has changed.  How do I now get ibus to use the larger font size that I want?  If I need to install something, I ask that it be done with dnf (apparently Fedora's preferred way of installing and updating), not flatpaks, not gnome's "software", not (etc.). There are two bugs relevant to ibus fonts: "https://bugzilla.redhat.com/show_bug.cgi?id=1409121" "https://bugzilla.redhat.com/show_bug.cgi?id=1410635" but both were fixed before my winter 2019 thread. By the way, Ed Greshko was one of the key helps in my winter 2019 thread, but I haven't seen any posts in this list recently.  Is he still with us?  Is Peng Wu a member of this list?