Apparently these planets have just helium and hydrogen, in a slushie-like mixture, no other chemical elements to make stuff, at least not enough to detect. No carbon, no hydrocarbons, no methane, no ammonia, etc.................
apparently is the key word, did the reported get it wrong or the “scientists”
No oxygen, then no water.
These ‘gas giants’ are really just humongous balloons full of hydrogen and helium...............