Adobe just released it’s latest Ps 2021 update in the past few days (rel. 22.4).
Be aware that if you are running Ps on a Windows OS that you may experience known errors (bug) with your docked Extensions/Plugins not displaying a symbol icon anymore. You might want to hold off updating to that version if you want to see the symbols for your docked extensions.
If you do experience the issue, you are not alone! Here’s where you can report it to get Adobe to grasp the urgency and the widespread need to ack & fix this Win-related bug: