The scientific lab is just a collection of packages on a Fedora KDE system, so you can just install whatever packages you want on an existing Fedora install—you don’t have to reinstall with the Fedora Scientific image.
Take a look at the existing groups and install what you need:
sudo dnf grouplist
Engineering and Scientific
“Engineering and Scientific” seems to have quite a few useful tools.
You can even just individually install tools that are in the Scientific lab image using DNF.
PS: please ask your questions in the appropriate sub category in the #english category. This was asked under the #community:contributing-to-fedora category but it isn’t about contribution, so I’ve moved it here now.
Some of them are funded by research bodies, others do it without pay. A lot of FOSS software is done without pay in free time (even here on the forum, few of us are paid to help others or work on Fedora tasks).
Can you please open specific topics for specific questions? This topic has a solution—it is not the place to ask unrelated questions now
You can install them all using sudo dnf groupinstall, just how you can install any packages from the repos. All labs/spins/images that the community ships can not include all the packages from the repos. They select the most commonly used packages and include those, and then users (like you) can install other bits as required.