You can ask your reader about mostly anything on your mind, however, be aware there are prohibited topics. The Terms & Conditions on Oranum’s website outline that it is prohibited to discuss any illegal activities or topics with your reader openly. So as long as you’re not discussing these themes, you are free to ask what you’d like.
They also don’t mention any prohibited reading themes like there are on competitor platforms. Commonly prohibited themes include legal, medical, and financial advice.
Although Oranum doesn’t explicitly prohibit these reading topics, I recommend you double-check with your preferred psychic ahead of time. I have seen readers disclose in bios that they do not feel comfortable reading about certain things, so I suggest making use of the free features on Oranum to get the most out of your reading.