Yeah! Because those things obviously did happen, but just weren't shown due to the third season being cut short due to its unfortunate cancellation.
Masha returned in "Thanks to Them" and so did Jacob Hopkins and that barista. The other boy that Vee is friends with made a cameo appearance in "Thanks to Them", but not that black-haired and brown-skinned boy who's voiced by Zeno Robinson. He only appeared on a picture in the Gravesfield Historical Society, but he was also shown in the end credits, where he was shown waving to Vee and Masha when they were possibly on a date. But does it count as an official appearance, even if it was only in artwork in the end credits?