Canyon make an xs TT / Triathlon bike with 650b wheels and disc brakes + all the fancy onboard hydration and on board tool storage - mono post riser full length arm pads etc.
I am 165cms and am going to order one.
My size s fuji norcom straight is an awesome bike - but I fell a bit out dated and have been struggeling to find a bike that fits.
I remember the first time i rode a bike that fitted me - a 47cm s works tarmac - I bought it - it was life changing.
So hopefully the Speed max will do the same.
https://www.canyon.com/en-au/road-bikes/triathlon-bikes/speedmax/cf-slx/speedmax-cf-slx-8-disc-di2/3063.html?dwvar_3063_pv_rahmenfarbe=BK%2FGN&dwvar_3063_pv_rahmengroesse=XS

I am 165 cm as well and looked at the fitting guide for this bike - interesting. The recommended break point between XS (650) and S (700) is 170 cm / 5'7". Hard to imagine everyone smaller than 5'7" / 170 cm on a 650 wheel bike! But this is a rare option of a high end race bike for those who don't fit well on frames with 700c wheels. Good find!

ETA: A similar thread is active right now.