Chapter confirms a lot of things about Maki:
She is on Toji Level.
She can see "everything's souls".
Her sword is a replica of Toji's and can cut souls no matter how hard the skin/durability is and the condition to cut it is the capability to see the souls (which she has now)... imagine Maki cutting a building in half...
DEs can't sure-hit her when summoned.
DEs can't trap her inside if she doesn't choose to participate/accept the rules.
She is "invisible" to cursed energy.
Mai's soul is inside the sword and Maki can see her sister because as the chapter revealed, She can see the souls of everything with her eyes now.
She can move freely inside domains if she is not bound by the rules.
Maki is called "fierce human-god of war" at the end of chapter.
but this is basically Yuuji's/Sukuna "title" when he is possessed.