You can find an example page 7 of the PCB Layout Recommendation for BGA Packages (FPGA-TN-02024) document. The example given has blind vias while the other 3 examples (which is found on pages 16, 17 and 47) are stacked vias. However, it also depends ...
Unfortunately, OLB file on this device-package is not available. This is a legacy device for Lattice and we don't have current plan to create new file for this device.
OrCAD Capture Schematic Library (OLB)" is available on Lattice website which contains symbols form both MachXO3L/LF devices. Please refer to this direct link: https://www.latticesemi.com/view_document?document_id=22487
Unfortunately, Lattice does not have a 3D CAD Model for their Board/Kits. However, Lattice could share a .brd file of the board/kit. This is a pcb file that could help on customers design. Customer can generate the .stp file (3D file) with a pcb ...
Lattice only provides OrCAD captured schematic symbols for Lattice FPGA's. Which user can find under respective FPGA product page, section Documentation > Technical Resources > Schematic symbols. ALTIUM CAD tool has an option for translating complete ...
The ORCAD symbol libraries are available on the respective device page on the website. Then go to Documentation section, under TECHNICAL RESOURCES tab > Schematic Symbols, you will find the OrCAD schematic library.