Hi Remi,
thanks for the quick reply.
Yes, I'd have thought so as well but seemingly not, unless I'm doing something wrong.
This is the repository I've setup, I know its only fc34, I promise I'l upgrade soon.

And i have the following installed
rpm -qa |sort|grep php-
php-8.1.9-1.fc34.remi.x86_64
php-bcmath-8.1.9-1.fc34.remi.x86_64
php-brotli-0.13.1-1.fc34.remi.8.1.x86_64
php-cli-8.1.9-1.fc34.remi.x86_64
php-common-8.1.9-1.fc34.remi.x86_64
php-devel-8.1.9-1.fc34.remi.x86_64
php-fedora-autoloader-1.0.1-4.fc34.noarch
php-fpm-8.1.9-1.fc34.remi.x86_64
php-gd-8.1.9-1.fc34.remi.x86_64
php-imap-8.1.9-1.fc34.remi.x86_64
php-intl-8.1.9-1.fc34.remi.x86_64
php-mbstring-8.1.9-1.fc34.remi.x86_64
php-mysqlnd-8.1.9-1.fc34.remi.x86_64
php-nikic-php-parser4-4.13.2-1.fc34.noarch
php-opcache-8.1.9-1.fc34.remi.x86_64
php-pdo-8.1.9-1.fc34.remi.x86_64
php-pear-1.10.13-1.fc34.remi.noarch
php-pecl-apcu-5.1.21-1.fc34.remi.8.1.x86_64
php-pecl-apcu-devel-5.1.21-1.fc34.remi.8.1.x86_64
php-pecl-mailparse-3.1.3-1.fc34.remi.8.1.x86_64
php-pecl-mcrypt-1.0.5-1.fc34.remi.8.1.x86_64
php-pecl-msgpack-2.2.0~RC1-4.fc34.remi.8.1.x86_64
php-pecl-xdebug3-3.1.5-1.fc34.remi.8.1.x86_64
php-pecl-zip-1.21.0-3.fc34.remi.8.1.x86_64
php-process-8.1.9-1.fc34.remi.x86_64
php-soap-8.1.9-1.fc34.remi.x86_64
php-sodium-8.1.9-1.fc34.remi.x86_64
php-xml-8.1.9-1.fc34.remi.x86_64
php-zstd-0.11.0-1.fc34.remi.8.1.x86_64
When I search for php-gmp I dont get much luck
[root@xxxxx public_html]# yum search php-gmp
Last metadata expiration check: 0:27:09 ago on Thu 05 Jan 2023 10:17:18 AM GMT.
No matches found.