timeOS gives you the option to allow your participants to change the duration of the meeting.
You can choose it on your template's settings:
Go to the new tab page.
Click 'Share time'.
Click the three dots next to the template you want to edit or press 'new template'.
Under 'Events details' --> 'Duration' check box the 'Allow guests to change duration' box.
Now choose between the two options.
We will always recommend picking 'Only allow shortening duration'. Making a shorter meeting is always a win-win. But you definitely don't want to come across a 120min meeting out of the blue. 🫣