I thought Disney owned Marvel. Sony/Columbia pix must have some grandfather clause or something that allows them to distribute the Spidey flix.
Sony bought the Spiderman movie rights back in the 90s during the Marvel fire sale. Same time that Fox bought the X-Men. Having botched Spiderman a couple of times Sony is now in a co-development deal with Disney making Spiderman movies that are kind of in the MCU and getting to include Spiderman in “proper” MCU films. Sony also owns the Fantastic Four.