In live mode, open console and type:
rpm -qa|sort > pkglist-sort.txt
which will create a plain text document in your user /home directory named pkglist-sort.txt
The packages list is sorted A-Z
The simple trick applies not only for ISO/Live mode but also for installed systems. You can run the command any time you need to.
If you wish a list of all the packages sorted by date type
rpm -qa --last > pkglist-last.txt
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See also
How to get a list of the latest updates