Webcenter Spaces Version: 22.214.171.124
When ' Enable RSS Publishing' is checked for a subspace, it is not shown in the RSS manager list. It appears that only Spaces are shown in the list and not subspaces.
This bug is listed in Oracle Support for version 126.96.36.199 (BUG 11874053).
This was to be fixed in 188.8.131.52, but this issue still exists. The bug is now updated and will be fixed in version 184.108.40.206 which is not yet released (at this date).