Hi,
fedora yum is obsolite log time ago...
https://www.2daygeek.com/comparison-difference-between-dnf-vs-yum/

Works for fedora 31:

[root@Galleon ~]# uname -a
Linux Galleon 5.6.13-200.fc31.x86_64 #1 SMP Thu May 14 23:26:14 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
[root@Galleon ~]#