Yes I was told they are supplied.
I personally did not get one with my ER One.
I bought a Sixweel UDH Direct mount hanger for Shimano

Do you have a link to sixweel  RD hangar

Hence my question and request for recommendations from experience

durability ?   
https://www.aliexpress.us/item/3256811977950349.html?productId=3256811977950349&selectedSkuId=12000057679036025&channel=detailPageDealCombineFloor&combineBizType=platformCoupon&intent_extra_sku_from=from_add_to_shopcart&type=mergeorder&pdp_npi=4%40dis%21USD%21100.30%2146.14%21%21%21100.30%2146.14%21%402101dedf17781752222103233e3af9%2112000057679036025%21fus%21US%21127729911%21X&trackParams=%7B%22businessScenario%22%3A%22choiceV2%22%2C%22activityType%22%3A%22PLATFORM_COUPON%22%7D&spm=a2g0o.detail.fusionpage.0&gatewayAdapt=glo2usa

Prefer in the range of 140gm (300mm)
any recommendations  

Boom. There it is on the XCadey, cadence sensing issues in peak power acceleration/sprints. I'd consider that in-line with my testing scope. And unfortunately for XCadey, in-line with my results.

I have talked to xcadey for months about the calibration and try to improve their discrepancies with power.  What they dont understand is that to be accurate there are a minimum of 3 pts in calibrations is needed not just 1
My explanation is
Power = Torque x "rpm" 
Torque from sensor is accurate but its assumed a linear relations ship [ Y=mX+C ]  where C is the offset at zero - That is the calibration number....  And m (slope) is fixed at the factory and its fairly accurate but when manufacturing deviates a tad that "m" is off and cannot be changed -  Thats why i propose a 2 point calibration (like the old Quarq) by placing a known weight to get the 2nd point.
now for cadence where the biggest issue with new power meters that dont use a magnet for rpm... the rpm can be all over the place and delayed and if using the peak of the sensor and average the time between a small amount of peaks that is problematic.....

I gave up trying to explain my case to them

i have 3 lexon bars and will be installing the 4th one next week.
Where did your bars crack at ?  and how did it happen ?
Post pics ...

It looks like you are looking for a 24mm axle option? Look through the Lexon crankset thread. People seem to have lots of issues with this design. I wanted to get 24mm version as well but ended up buying dub version from Leese and swapping the BB

Please share link