
Hi Rita Rita,
Good day! Welcome to Q&A forum.
From your description, you had a SharePoint site named local pet - and it has just disappeared. it is not in our deleted or archived sites it is just gone.
I would like to confirm that you have checked for the existing deleted sites in the SharePoint admin center> "Deleted sites", as shown below
Additionally, it is possible that the site URL and the site name have been changed. In this case, I recommend you search for the files stored on this site at the organization level. You can go to office.com and search for the relevant files. See if you can see the relevant files in the search results.
If you have checked existing deleted sites and do not see this site, in this case, you can try the following suggestions.
Suggestion 1:
Use PowerShell to get all deleted SharePoint sites and try to restore this site.
a. Download the latest SharePoint Online Management Shell.
If you installed a previous version of the SharePoint Online Management Shell, please uninstall "SharePoint Online Management Shell" via Windows settings> Apps & features.
b. Get all Deleted sites. Remember to edit the $AdminSiteURL parameter
$AdminSiteURL = "https://Crescent-admin.sharepoint.com"
#Connect to SharePoint Online
Connect-SPOService -URL $AdminSiteURL -Credential (Get-Credential)
#Get all Deleted Sites
Get-SPODeletedSite
c. See if you can find this site.
If you don't see this site, please try Suggestion 2.
If you can see this site, run the following commands to restore it. Remember to edit the Identity parameter and replace it with the site URL.
Restore-SPODeletedSite -Identity "https://crescent.sharepoint.com/sites/Vendors"
Suggestion 2:
If you don't see this site listed in All Deleted Sites, I recommend you open a support ticket with Microsoft for further assistance. You can contact your tenant administrator or IT team and ask them to raise a support ticket via Microsoft 365 admin center > Support> Help & support. That support team there will have the correct channel and resources to check your environment remotely and try to restore the site at the backend.
Similar issue post for your reference:
Sharepoint site is missing - Microsoft Community
Hope these information helps.
Please do let us know if you have any further queries.
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