Dear emubigdog,
Thank you for reaching out to the Microsoft community. We are delighted to offer our assistance.
I'm sorry I didn't fully understand your needs, but are you opening the file on a mobile device or on a computer? Do you mean you want the file to open in the Excel client and not in Teams? Please help us with further information so we can help you figure out.
Thank you for your understanding and cooperation! Have a great day.
Sincerely,
Sean | Microsoft Community Moderator