After install of Fedora-31-20190820.n.4 - either Workstation live or Silverblue installer - gnome-initial-setup does not run; instead you just get a blinking cursor at top left.

At least with the Workstation live, booting with enforcing=0 seems to help, and the following AVCs are shown in the logs:

Aug 21 14:54:19 localhost-live systemd[997]: selinux: avc:  denied  { start } for auid=n/a uid=979 gid=977 path="/usr/lib/systemd/user/dbus-broker.service" cmdline="/usr/libexec/gnome-session-binary --autostart /usr/share/gdm/greeter/autostart --session gnome-initial-setup" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_unit_file_t:s0 tclass=service permissive=1
Aug 21 14:54:22 localhost-live audit[1268]: AVC avc:  denied  { mount } for  pid=1268 comm="fusermount3" name="/" dev="fuse" ino=1 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:fusefs_t:s0 tclass=filesystem permissive=1
Aug 21 14:54:26 localhost-live audit[813]: USER_AVC pid=813 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc:  denied  { send_msg } for  scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:avahi_t:s0 tclass=dbus permissive=1
Aug 21 14:54:26 localhost-live audit[813]: USER_AVC pid=813 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc:  denied  { send_msg } for  scontext=system_u:system_r:avahi_t:s0 tcontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tclass=dbus permissive=1
Aug 21 14:54:35 localhost-live audit[1]: USER_AVC pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='avc:  denied  { status } for auid=n/a uid=0 gid=0 cmdline="/usr/sbin/timedatex" scontext=system_u:system_r:timedatex_t:s0 tcontext=system_u:system_r:init_t:s0 tclass=system permissive=1
Aug 21 14:54:35 localhost-live audit[1]: USER_AVC pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='avc:  denied  { status } for auid=n/a uid=0 gid=0 path="/usr/lib/systemd/system/systemd-timesyncd.service" cmdline="/usr/sbin/timedatex" scontext=system_u:system_r:timedatex_t:s0 tcontext=system_u:object_r:systemd_timedated_unit_file_t:s0 tclass=service permissive=1
Aug 21 14:54:35 localhost-live audit[1]: USER_AVC pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='avc:  denied  { status } for auid=n/a uid=0 gid=0 path="/usr/lib/systemd/system/chronyd.service" cmdline="/usr/sbin/timedatex" scontext=system_u:system_r:timedatex_t:s0 tcontext=system_u:object_r:chronyd_unit_file_t:s0 tclass=service permissive=1
Aug 21 14:54:35 localhost-live audit[813]: USER_AVC pid=813 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc:  denied  { send_msg } for  scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:timedatex_t:s0 tclass=dbus permissive=1

there's some more timedatex stuff in there, but also some dbus stuff. This is with selinux-policy-targeted-3.14.4-31.fc31 , so should already have the known timedatex fixes.

For the Silverblue case booting with enforcing=0 didn't actually seem to fix the problem at least the first time I tried it, but not sure why not yet...