While production Max jets awaiting delivery are all over Moses Lake, they aren’t the only 737s stored there.  Coming up on the south side, the first jets to be visible were Delta Airlines 737-900ERs.  I assume these have been stored here while a substantial portion of the fleet is inactive due to the massive downturn in air travel resulting from the pandemic.  No idea how long these jets will be here but I guess Delta will pull them out as they increase the schedules.