A recent paper was already sited about the possibility of frozen hydrogen.
I'm not aware of any such detection. However since we cannot detect 1km snowballs in the Oort I think it's probably impossible (just now).
A mass of hydrogen and helium, with a teensy amount of metals, can contract under its own gravity, and efficiently get rid of the 'contraction energy' through electromagnetic radiation (that's what the metals do). 'Dust' which clumps to form planetismals can become massive enough to hold hydrogen and helium against escape.
Yes, that is partly my point. Do you suppose that no condensation occurred before a Neptune-size mass was gathered and then all at once condensed into Neptune?
The physics of condensation is very complex and not completely understood. What survives in the formation of the solar system is not necessarily indicative of all conditions.
I hope you are not suggesting that metals are required for condensation.
Your claim is that little or nothing condenses that is between the size of a dust particle and a small star. That's a mass ratio of ~10^31 (conservatively) within which no condensed matter can exist in any significant quantity. Does that help? This is a mass distribution that I do find odd.That's an enormous gap in the mass distribution of condensed matter objects (~10^31).
If you want to tell me about some papers that criticize this work, fine.
If you haven't heard that stars have been detected at z~6 or that cold temperatures (~10K) seem to be required, then I think you need to do some reading.