Restoration of deleted team

thank you for replying.

i meant that it was a team visible on MS teams and sharepoint but not on outlook mailing groups.

unfortunately since it was not archived, the link you sent me did not help it, but i would like to try Sharepoint admin center one. if you have further information how you do that, please let me know.

thank you for helping me a lot!!

I do not know why but actually it has been restored, probably by the admin of my organization.

I appreciate you.

I'm not understanding the question. If you are talking about restoring a SharePoint Team site, you can restore via SharePoint Admin Center. I guess my confusion is you say "It was not a Microsoft 365 team, only Microsoft teams' team" 

Archive or restore a team in Microsoft Teams - Microsoft Support

if it's an MS TEAMs you won't find it in the SharePoint Online admin center, however I found another article hope it helps ... Restore/Recover Deleted Team | Microsoft Community Hub

... Please note all TEAMs have an O365 Group when created ... Restore a deleted Microsoft 365 group - Microsoft 365 admin | Microsoft Learn