[~]$ locate okularGenerator_epub.so
/usr/lib64/qt5/plugins/okular/generators/okularGenerator_epub.so
[~]$ locate okularGenerator_ghostview.so
/usr/lib64/qt5/plugins/okular/generators/okularGenerator_ghostview.so
[~]$ locate okularGenerator_poppler.so
/usr/lib64/qt5/plugins/okular/generators/okularGenerator_poppler.so

[~]$ rpm -qa | grep okular
okular-common-23.08.0-1.x86_64
okular-epub-23.08.0-1.x86_64
okular-pdf-23.08.0-1.x86_64
okular-23.08.0-1.x86_64
okular-postscript-23.08.0-1.x86_64

[~]$ rpm -qa | grep poppler
lib64poppler113-21.09.0-1.x86_64
lib64poppler117-22.01.0-1.x86_64
lib64poppler118-22.02.0-1.x86_64
lib64poppler-cpp0-22.02.0-1.x86_64
lib64poppler-qt5_1-22.02.0-1.x86_64
poppler-data-0.4.12-1.noarch
lib64poppler-23.08.0-1.x86_64
poppler-23.08.0-1.x86_64