Well, Spider-Man: No Way Home and Hawkeye shows that Marvel Studios was willing to keeping the Defenders series canon despite not being involved in their production. They were made by Marvel TV and Netflix.
Marvel was even initially open to making the Amazing Spider-Man series canon to the MCU. Oscorp tower was going to appear in the first Avengers movie. They only changed gears after Sony ignored Kevin Feige's advice on The Amazing Spider-Man 2 and the film underperforming. There was also a leaked email where Feige suggested that he would not have rebooted the Sam Raimi series.
Marvel Studios is of course a business, so naturally they would want to keep around properties that are profitable regardless of who made them.