You can download/export the project from Flux using the Export options in the project UI.
Typical steps:
Open the project in Flux.
Go to the Files / Export area or use the project menu.
Choose what you want to download:
Gerbers for PCB manufacturing
BOM for parts list
Pick-and-place / CPL for assembly
STEP/3D if available
Source/design files if the project owner has enabled access
Click Export or Download.
One important note: your access level on this project is comment, so you may not be able to download all editable/source files unless the owner grants you higher permissions or enables sharing/export. If the download/export buttons are missing or disabled, ask the project owner (vasyl) to give you edit access or provide an export.