Hi there,
SOAPBOX ON…
I must say this is a LARGE disappointment, even Nordics own Dev kit has a external (onboard flash) chip. as Does the Nrf52840 Xiao. The whole compressed partition scheme is a bandaid on a flesh wound., a.k.a. " Gimmick ".
You guys better add a flash to the final version or your wasting the opportunity to really effectively use ALL the features the device brings.
Luckily it’s just pre release… 
AS you were…
and bring Back the RGB led. ASAP!
That is all…
GL 
PJ 
You prove you can fit it , Now get it right! 