I have had thr same issue a few times
yet just as with imp the page shows up later

seems the server of the wikia just needs some more time sometimes

can also happen when making a new category type (sonething I do often when making a new race as all my races possess their own category)

Can I also advice you to add your own name or something like a signsture category to your pages so that it canbe easier to find all of yyour own work
its easy to make. Just as you add a category. You just need to type the personal category fully and enter.
then publish