Windows Server 2022 uses the Windows 10 taskbar, and 7+TT version 5.15.1 works for everything except "Combine grouped buttons".
If I set Windows Taskbar Settings to "Never combine", then 7+TT can't combine them, using either the global setting or manually through Taskbar Inspector. OTOH, if I set Windows to "Always, hide labels", then "Don't combine grouped buttons" works to un-combine, as does using Taskbar Inspector manually.
I understand there probably aren't a lot of Server 2022 users, but the free Evaluation version has full features and can be used to test any issues.
Customer support service by UserEcho