I know that's the title of the news article you linked, and I've seen it elsewhere already, but that's not actually what they awarded money for.
"$8.5 million to CastleVax for a vector-based intranasal vaccine candidate.
$10 million to Codagenix for a live-attenuated intranasal vaccine candidate."
Out of the $500 mill that's all that's going towards nasal vaccines.