Raising your (virtual) hand in a Teams meeting is a great way to let the moderator know that you have a question or comment. However, the button to do a hand raise was sort of buried in the menu and wasn’t very intuitive. Microsoft made some user interface changes, and now there’s a dedicated hand raise button on the meeting bar. Here’s what it looks like…
The Raise button is now a separate button in the meeting bar. If you click that button, your hand will be raised:

Here’s what it looks like when I click the button… My name shows a raised hand in the list of people, and the Raise button has a blue underline showing that it’s active:

If I click the button again, the blue underline is removed, and my hand is lowered next to my name.