After teams updating to latest Version

Hello  

welcome to the Microsoft community, My name is Yakubu Suleman I'll be happy to help you today;

I understand that you are having a problem with skype for business users' presence not showing on teams.

Please note that Skype for business online has been retired since July 31st 2021 However 

Coexistence modes applies to both Skype for Business online before getting retired and on-premises.

For more information, you can refer to the following two articles:

https://learn.microsoft.com/en-us/microsoftteams/coexistence-chat-calls-presence#presence

https://learn.microsoft.com/en-us/microsoftteams/upgrade-to-teams-execute-skypeforbusinesshybridonprem

https://learn.microsoft.com/en-us/microsoftteams/upgrade-to-teams-execute-skypeforbusinessonline

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Kindest regards,

yousuftelecom