Are you referring to an individual elderly parents thread - or the Elderly Parents Topic as a whole?
If you mean the topic, it's easily findable if you look in the A-Z of topics. There were a number of us that petitioned, very strongly, for a specific Elderly Parents topic last year, which is why MNHQ added it as a new topic.
I found it very helpful when I was dealing with my late mother, and also found it very hard to find. I agree it should be more visible, it's a subject that so many of us have been or are going through.