Well mine is always zero (see the attached) so I can confidently say it is incomplete as of the time I post now. On my account setting, there is Stellaris shown, but not in the sync page.
That it's 0 needn't mean anything. Again the x/54 merely tells you how many icons you're showing---I for instance always run with the maximum so mine says 54/54, but some people run with way less. If you have over 54 games you then get the golden bar I have---the number within it tells you how many games that person owns.
Anyway what looks strange in yours is that you don't have a list of games under the x/54. Look at my screenshot if you're not sure what I mean by a list. All registered games should form a list there.
So that indeed looks like you didn't sync.
What is it you say you can see Stellaris? Can you post a link to that page? (Also did you by chance purchase Stellaris from PI?)
Also I can see you registered your account today---when did you start the sync (remember to tell the time zone too, since saying e.g. 8 AM is meaningless without time zone). Since you're newly registered are you then sure your email is verified? That might be worth checking, although I don't know whether it can interfere with the sync.