Update:

> Block diagram revised: [...]

New block diagram released without any significant changes.

Also, new schematics released:
https://gitlab.com/power-progress-community/oshw-powerpc-notebook/powerpc-laptop-mobo/-/blob/master/PPC_notebook_electrical_schematics_v0.4.pdf
https://www.slideshare.net/RobertoInnocenti1/electrical-schematic-open-hardware-powerpc-notebook-motherboard-v-04

Furthermore:
"After receiving these new schematics, we already requested a new round of changes to the designer, in particular we would like to raise the motherboard power consumption footprint up to 90W in order to support higher ends MXM 3 video cards that consume a maximum of 55W. As an example, the AMD Radeon E9174 (GCN 4.0) has a TDP of 50W. The idea is to obtain a new version of electrical schematics before the end of May. [...] there are two SO-DIMM DDR3L slots that can host DDR3L non-ECC (max 1866 MT/s, PC3-14900). We opted for non-ECC modules as they are way easier to find on the market and are less expensive than ECC ones, so it will be easy to have 32GB of RAM (2x16GB), up to a limit of 64GB of RAM, if you can find 32GB SO-DIMM modules."
https://www.powerpc-notebook.org/2020/05/growing-up-collaborations-may-2020-updates/