Many thanks for the nice finding! Cortex M0 with an interesting setup!
About the scale: The HX711 is not only an ADC but also a PGA, it amplifies the signal before it is digital encoded. So you will not be happy with this, perhaps you can use some percent of the full range. So even if you would have 24 bit it will not work as expected.
But that’s no problem! Why not using the HX711 near the scale and transmit the digital data over the longer part of the wire? There are tiny IP6x rated cases you can put in the HX711 and position it near the load cell. Just for the ideas see HX711 Junction Board für 4 Wägezellen