I'm migrating from LPC1769 to LPC55S28 so I had the pleasure to use the SDK facility for the first time.
You are reporting a "not installed" message in SDK Details. I also saw this message in SDK Details, see screenshot:

In my case, the "not installed" message was caused by having two SDKs installed with both SDKs containing the same part support.
The excellent documentation explains this message, see "MCUXpresso IDE User Guide Rev. 11.3.0", page 37, Section 4.2.8 "Important notes for SDK Users":
"...If both SDKs are installed into the IDE, both sets of examples and
board drivers will be available, but the IDE will select the most up to date version of part support
specified within these SDKs."
I "uninstalled" the other SDK and now the part support is taken from this SDK.