I looked into [debian libphonenumber packaging](https://packages.debian.org/stretch/libphonenumber7) and [lib source repo](https://github.com/googlei18n/libphonenumber). Then i also checked [fedora devel repo](https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything...).
Looks as libphonenumber is not RPM packaged now inf Fedora/RHEL. Also I found spec for fedora. https://gil.fedorapeople.org/libphonenumber.spec https://gil.fedorapeople.org/
Could you open ticket on Fedora bugtracker to package libphonenumber. Example of speck already exist. When it be done, then we can package this module for Fedora. Think for RHEL libphonenumber not be packaged so fast as for Fedora. But you can try.