It seems that Devil May Cry 3 Special Edition on Switch might allow you to change styles on the fly, as indicated on the UK official website.
Here’s the description from the UK site below:
“Will you prioritize speed or defense? Swordsmanship or gunplay? The new Style Change system allows you to experience the action through a number of unique Styles allowing for unprecedented variety. Level up the Styles and weapons as you see fit and create a playstyle all your own.”