[CentOS] C8 regression / tmp on tmpfs

Does someone have a working tmp on tmpfs via

systemctl enable tmp.mount

under CentOS8/RHEL8? This seems to work straight in EL7 ...


# LANG=C systemctl enable tmp.mount
The unit files have no installation config (WantedBy, RequiredBy, Also, 
Alias
settings in the [Install] section, and DefaultInstance for template units).
This means they are not meant to be enabled using systemctl.
Possible reasons for having this kind of units are:
1) A unit may be statically enabled by being symlinked from another unit's
    .wants/ or .requires/ directory.
2) A unit's purpose may be to act as a helper for some other unit which has
    a requirement dependency on it.
3) A unit may be started when needed via activation (socket, path, timer,
    D-Bus, udev, scripted systemctl call, ...).
4) In case of template units, the unit is meant to be enabled with some
    instance name specified.

--
Leon