Package is not installable on epel7.

package: fleet-commander-admin-0.10.8-2.el7.noarch has unresolved dependenycy:

 python3

You shouldn't hardcode python version, there is macro %{python3_pkgversion} to use on epel7.

You could also generalize epel7 support by using %{python3_pkgversion} in both fedora and epel by adding:

# Single python3 version in Fedora, python3_pkgversion macro not available
%{!?python3_pkgversion:%global python3_pkgversion 3}

Or you can just make epel7 part only to use macro.

%if 0%{?rhel} && 0%{?rhel} < 8
Requires: python%{python3_pkgversion}
%else
Requires: python3
%endif