There’s absolutely nothing wrong with reporting the facts that you do have when you have them and are confident of your sources.
Acknowledging remaining open questions that you don’t have answers to yet, is a bonus.
A perfect example of reporting before the fog of war clears would be reporting completely erroneous information as factual. So unless you’re suggesting that a Ukrainian fighter jet did NOT in fact strike a target inside Russia, then this isn’t the “perfect example” you’re looking for.