An article with many interesting questions about the day of the Grand Oral
I advise you to read this article, which answers many of the questions you may have:
What should you wear on the day of the Grand Oral?
Can you use the board during the presentation?
Can you use a calculator?
Etc....
Here is the link: https://www.education.gouv.fr/reussir-au-lycee/baccalaureat-comment-se-passe-le-grand-oral-100028
Happy reading.