Someone created your father's profile at Wikitree in 2015, and then stopped managing it. I don't know if the person left Wikitree, or what happened, but no one is specifically managing his profile at present.
The best thing that could happen is if someone, perhaps a relative like you, would volunteer to join Wikitree and "adopt" your father's profile and add information to it, and maybe help add branches to family tree.
Is that something you might be interested in doing?
I see that some other Wikitree volunteers have added information to his profile in the past two years. Does everything in his profile look correct to you so far? We'd be glad to add information (if you don't want to do it yourself) if it can be substantiated and doesn't affect the privacy of living people.