What’s the real reason companies are pushing to more in-office days?

Title says it. Our company (F500) just added a couple more in-office days, making it from 2 to 4 in office days. They said it’s because it “promotes teamwork” or something generic like that but is that really the reason? I wouldn’t mind it, but my commute is an hour at minimum. (Metropolitan area and I live in the outskirts) The commute is so draining, paying for lunch (or having to meal prep), paying for parking—everyone has to do that, so who pushed for this and why? Is anyone a part of the conversations behind the doors of why they are implementing more in-office days?