Thanks for reaching out to the Microsoft Q&A forum.
To ungroup emails, please go to View and uncheck Show as Conversation.
For more details, you can refer to: View email messages by conversation in Outlook - Microsoft Support
I hope this helps clarify the situation. If you have any other questions or need further assistance, feel free to let us know.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.