Additional features, settings, or issues not covered by specific Microsoft Teams categories
I found that if you go back to the original dial pad and then dial a new number it will place the current person on hold. You can then go through the prompts while the other person is on hold because the new call has the dial pad. Once you are connected to the other person you can then hit the 3-button menu at the top right and merge the calls together. You can do this multiple times too. Personally prefer this because then the other person / persons don't have to hear you go through the menus anyways. Hope this helps someone.