Just a side note,
we should have the right package versions in 24.04 as of today:
$ rmadison --suite=noble,noble-proposed openssl-pkcs11-sign-provider opencryptoki
 openssl-pkcs11-sign-provider | 1.0.1-0ubuntu1       | noble/universe          | source, amd64, arm64, armhf, ppc64el, s390x
 openssl-pkcs11-sign-provider | 1.0.1-0ubuntu2       | noble-proposed/universe | source, amd64, arm64, ppc64el, s390x
 opencryptoki                 | 3.23.0+dfsg-0ubuntu1 | noble/universe          | source, amd64, arm64, armhf, ppc64el, s390x
 opencryptoki                 | 3.23.0+dfsg-0ubuntu2 | noble-proposed/universe | source, amd64, arm64, ppc64el, s390x
(Notice that the "0ubuntu2" versions of these packages that are currently in -proposed are not urgently needed in this case, since they are 'no-change rebuilds' against libssl3t64, which is only relevant for arm.)

And it looks like the patches apache packages are installable on 23.10 as well - easiest is probably:
Quickly wget them:
wget https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/apache2-bin_2.4.58-1ubuntu4~ppa1_s390x.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/apache2-data_2.4.58-1ubuntu4~ppa1_all.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/apache2-dev_2.4.58-1ubuntu4~ppa1_s390x.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/apache2-doc_2.4.58-1ubuntu4~ppa1_all.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/apache2-ssl-dev_2.4.58-1ubuntu4~ppa1_s390x.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/apache2-suexec-custom_2.4.58-1ubuntu4~ppa1_s390x.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/apache2-suexec-pristine_2.4.58-1ubuntu4~ppa1_s390x.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/apache2-utils_2.4.58-1ubuntu4~ppa1_s390x.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/apache2_2.4.58-1ubuntu4~ppa1_s390x.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/libapache2-mod-md_2.4.58-1ubuntu4~ppa1_s390x.deb https://launchpad.net/~ahasenack/+archive/ubuntu/apache2-modssl-provider-support/+files/libapache2-mod-proxy-uwsgi_2.4.58-1ubuntu4~ppa1_s390x.deb
And install from local:
$ sudo apt install ./apache2_2.4.58-1ubuntu4~ppa1_s390x.deb ./apache2-bin_2.4.58-1ubuntu4~ppa1_s390x.deb ./apache2-data_2.4.58-1ubuntu4~ppa1_all.deb ./apache2-utils_2.4.58-1ubuntu4~ppa1_s390x.deb ./libapache2-mod-md_2.4.58-1ubuntu4~ppa1_s390x.deb ssl-cert

However, you can also quickly upgrade your 23.10 system to 24.04, which is probably recommended in this case, to get real 24.04 test results (of course only if your system is test/dev system and not a production system). These are the steps:
1) ensure you have all the latest updates installed on your 23.10 system:
   sudo apt -q -y update && sudo apt -q -y full-upgrade
   (and in case you got a new kernel, you may reboot your system)
2) then run do-release-upgrade, maybe non-interactive like this:
   sudo do-release-upgrade --quiet --devel-release --frontend=DistUpgradeViewNonInteractive
   (caution with the non-interactive cmd-line, since you will not be asked all safety questions anymore,
    like opening a fall back ssh session etc.)
3) and if everything was fine you can reboot into a 24.04 system:
   sudo reboot