Entering a nominally xx minute meeting and announcing you need to leave by a certain time to meet another commitment (up to you but quite a bit shorter than the planned xx minutes) almost guarantees the meeting will actually only last until your stated departure time. At worst, the stuff that is important to you will probably be dealt with, and topics that don't concern you can happen without your reluctant attendance.
Entering a nominally xx minute meeting and announcing you need to leave by a certain time to meet another commitment (up to you but quite a bit shorter than the planned xx minutes) almost guarantees the meeting will actually only last until your stated departure time. At worst, the stuff that is important to you will probably be dealt with, and topics that don't concern you can happen without your reluctant attendance.
My team has a standard for all “30” minute meetings to start at 5 after (eg 1:35 instead of 1:30) and all “60” minute meetings start at 10 after. This gives folks a built-in break and shortens the time to be 25 or 50 minute meetings. There’s an Outlook setting that will do this for you automatically! https://support.microsoft.com/en-us/office/end-meetings-early-or-start-late-ebb4c4c9-6992-4ea7-9772-8b5883df8500