At least a couple of weeks a go there were both options of scheduling a meeting and meeting now. Now the first option is gone. First, I would ask why did you make such a "smart" change and secondly, to guide me step by step on how to schedule a meeting, including all related settings (e.g. who can present etc.) in case this has been changed too.
Hello, are you using Teams free or a business subscription? The availability can be controlled by using a Teams meeting policy, if you're using the latter, and has nothing to do with a "smart change" from Microsoft. Rather something your IT admin has disabled (if you have that subscription).