One analysis suggested that a hybrid work but without specific corporate mandate seemed to see the best result.
If the business arbitrarily said “come in all the time” or “come in three days a week”, they tended to not get good results.
If the business said “ok, no more office, all remote”, they seemed to also not get good results.
The businesses that said “office is open and ready for you to use as you and your teams see fit”, they seemed to have the best result. The optimistic will ascribe that to people thriving on the flexibility and respect of their employer. My somewhat more cynical view is that peer pressure works to get people into the office, and the employee is less pissed because it’s “their choice” to come in. Just like when a company grants employees “unlimited vacation” and rejoice, as unlimited vacation tends to mean the employees take less vacation.