Summary 

Adobe no longer supports Flash Player after December 31, 2020, and blocked Flash content from running in Flash Player beginning January 12, 2021, Adobe strongly recommends all users immediately uninstall Flash Player to help protect their systems.  

https://www.adobe.com/products/flashplayer/end-of-life.html

Steps:

a) Scan the system and get Adobe Flash in the Scan Results in SVM.
b) Update Smart Groups to ensure that the latest suggestions are made
c) Go to SPS and simply double-click on the Adobe Flash entry (in grey!)
d) Enable the "Edit Package Content" checkbox and click Next. ( You can also import the attached XML file here, which contains all the below steps)
e) In the JavaScript template, insert "-uninstall -force" in the *var silentParams * variable
f) Download the file from the link below and import it manually into the SPS package wizard.
g) Use "Export SPS Package" to export the executable to the file system
h) Transfer the SPS package to the machine where Adobe Flash is installed 
k) Double-click on the SPS.exe file and accept the UAC prompt.

Please note: After testing the package with the above steps.  You can name the package as a uninstall Adobe Flash player package on step 1 and then processed it with package publishing via WSUS to deploy on your machines. 

File Used:
https://fpdownload.macromedia.com/get/flashplayer/current/support/uninstall_flash_player.exe