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Hi @Ghadeer Yehia-Khaled, Vodafone,
Welcome to the Microsoft Q&A forum.
I would like to provide you with the following information:
If you want to add the Owner permission back to your SharePoint site, you can follow the steps below.
Note: The following steps require an account with administrator (Admin) privileges in the tenant. If you do not have admin permissions, please contact your organization’s IT department for assistance.
Steps to follow:
Step 1: Go to admin.microsoft.com
Step 2: Scroll down and select SharePoint
Step 3: In the SharePoint Admin Center
Step 4: Select Sites > Active sites > click the site you created
Step 5: Select Membership > Site owners > Add site owner, then add your account back
I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.
Thank you for your patience and your understanding. If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.
I look forward to continuing the conversation.
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