Not as much as you'd think actually. Maki didn't blitz or be blitzed by Hanami in their encounter. Hanami mostly relied on her durability and just kind of stood there and ate what Maki and Megumi had to offer. There was one moment where Hanami fired a root spike a Maki's heart and she's able to just twist away so it hits her shoulder and Hanami is like "you have good reactions,"
So we can deduce that Hanami thinks bullet catching speed is pretty fast but not much about how that relates to her own abilities.
The next time we see her, as recall, she gets utterly flattened by Gojo but then Gojo flattens basically everyone.