It appears that WebView2 Runtime is listed as a System Component and no longer shows up with the install list. The relevant registry is as follows, change it to 0 to restore the display.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Microsoft EdgeWebView]
"SystemComponent"=dword:00000001