Hello Mrs! My name is Janbaz, and I am an Independent Advisor as well as a long-time Microsoft user. I'm sorry that you are experiencing this issue, and I am hopeful that I will be able to help you find a satisfactory solution.
Dear Mrs, Yes, you can upload an image of your own, select Add new and pick a . JPG, PNG, or. BMP file from your computer. Select Preview to see how your chosen background looks before you apply it, and then select Apply.
Please check the below article related to your issue:
Change your background for a Teams meeting
Here is how you can change the background of a meeting.
Open the Meet app. and select a meeting.
Before you join, at the bottom of your self-view, tap Effects. To slightly blur your background, tap Slightly blur. To completely blur your background, tap Blur background. To upload your own background, tap Add . ...
When you are done, tap Done.
Tap Join.
Please let me know if this doesn't work or if you need further assistance.
Warm Regards,
Janbaz