Attack boosts don't affect skill damage?

#1

For e.g. I’ve used Kunoichi’s full offense and realised that it doesn’t affect tbe damage of her knife skill at all. Meaning stat boosts only boosts base attacks? Like Maven Plat only helps her gun damage but not her fires?

#2

Yes, that is correct

#3

Some stuff can boost both, like chesterfield and razors flare and ensnare