I upgraded Stardock hoping this feature would be here by now. Nope. I am not going to ask for a refund but I WILL NOT buy another license for Stardock Object Desktop until this feature is available. Luckily I think there is another product out there I have read about which can supply this feature. I will not use Windows 11 unless I can have labels. I rely on them way too much.
You're looking for taskbar buttons label yes? If so, it already implemented few released back. Have you tried latest Start11 release?
Stardock Community Assistant