The Disney Sony deal for this movie is, Disney puts up 25% of the budget and gets 25% of the profits. Disney wanted a 50/50 deal, which is what Sony walked away from.
My guess is, Sony may keep Spiderman in the MCU if they can get the same deal with Disney again, but will move forward with a Spider-Man 4 with Tobey Maguire if this movie is a hit. Would make sense, to make a final one, they can milk the last bit of love out of the Sam Rami movies. With the multiverse being set up, not stepping on the toes of MCU Spiderman and they can see how a Spiderman movie would now do without the MCU links, so let's say for a Tom Holland Spiderman 5 which move away from the MCU allowing Sony to get the full 100% of the profits.