Mark Milley made no such statement.
Lukashenko has gone far beyond providing financial support and allowed the Russian government to expand its abduction of Ukrainian children into Belarus.
International maritime laws govern the passage through the Strait of Hormuz. As coastal states, Iran and Oman can impose local regulations but complying with them is advisable, not mandatory.
There is ironclad evidence that Russia sends conscripts directly into combat in its war in Ukraine. Often with little training and poor supplies.