If you mean download/export this Flux project, you’ll need edit access or the owner may need to share/export it for you. Since you currently have view access, download/export options may be limited.
Try this:
Open the project.
Look for Export / Download in the project menu or Files/Manufacturing area.
If available, choose the format you need:
Gerbers for PCB fabrication
BOM for parts list
Pick-and-place for assembly
STEP/3D model if you mean the physical board model
Source/project export if available
If you don’t see those options, ask the project owner vasy_skral to either:
give you edit/fork permissions, or
export the files and share them with you.
If you mean a specific 3D model/component model rather than the whole project, tell me which part you want to download.