The following command prints the SDKs or toolchains (or both) that are installed on your machine.
nrfutil sdk-manager list
The command outputs the list of versions and their status for the default or selected installation directory:
Version SDK Toolchain
v2.9.0 Not installed Installed
v2.8.0 Installed Installed
v2.7.0 Not installed Installed
v2.6.2 Not installed Installed
v2.6.0 Not installed Installed
v2.5.0 Installed Installed
v2.4.0 Installed Installed
v2.3.0 Installed Not installed
v2.2.0 Installed Installed