RPMs of PHP version 8.1.8 are available in remi-modular repository for Fedora ≥ 34 and Enterprise Linux ≥ 8 (RHEL, Alma, CentOS, Rocky...) and in remi-php81 repository for EL 7.
RPMs of PHP version 8.0.21 are available in remi-modular repository for Fedora ≥ 34 and Enterprise Linux ≥ 8 (RHEL, Alma, CentOS, Rocky...) and in remi-php80 repository for EL 7.
No security fix this month for 7.4 and 8.0, so no update for version 7.4.30.
PHP version 7.3 have reached its end of life and is no longer maintained by the PHP project.
These versions are also available as Software Collections in the remi-safe repository.
Version 8.1.8 fixes 1 security bug, so update is strongly recommended.