Finally I finished the prototype for the MPPT solar charger board with new Linear LT8490.
Obviously someone else made a board layout from my schematic and put this online for manufacturing.
The green one is my layout version 3, shown here.
I put my latest project online: A MPPT solar charger board to charge a 3S LiPo from a 36 cell solar panel. The design is flexible and can be set to any other cell count or output voltage/current.