I think it's a safe bet we're going to see more secret identities going forward given that there's a fair number of younger heroes coming up on the slate. I suspect given Peter's situation that that protection of his identity may be a stipulation of the Sokovia Accords, precisely because he's not of age.
I can very easily see a similar situation for Kamala, and probably M iles whenever he inevitably turns up.
Not sure about Kate Bishop since Hailee Steinfeld is definitely an adult (did True Grit really come out a decade ago? fuck that makes me feel old) and one assumes Kate is too...plus one has to wonder where the Sokovia Accords draws the line between 'enhanced' people and just really really skilled people with fancy toys. And I suppose both of the above apply to Riri too since I gather the actress they've cast is also in her 20's (though wasn't she a teen in the comics?)