Hello @kk7xo ,
I confirmed that OM13089 is not obsolete, and in our internal system it is still in active status. But due to the very low run rate and cost constraints, and since we recommend all new designs to migrate to the MCX platform, we have not been replenishing stock for this board.
This may be why some distributors label it as “Obsolete” on their sites, even though the official lifecycle remains Active.
For your current need, we recommend either moving to the OM13077 board for the LPC54100 family, or using the available schematic files to build the board on your own. Sorry for the inconvenience caused.

Have a great day.
BR
Celeste