Hi, Chet,
I suppose that we have not the library of LPC55S69-EVK based on the Altium tools, because we do not develop the PCB with the tools.
If you want to develop the schematics library, pls refer to Table 3. Pin description in data sheet. If you develop the LPC55S69 package library, pls refer to 14. Package outline in data sheet of LPC55S6x.
I suppose customer or third party may have the two library of LPC55S69, hope they can share the library here so that the other people can reuse them.
BR
XiangJun Rong