Here is the list of books that are available in pdf. The board says on its website that it is currently making pdf books and soon all the books will be available in pdf.
I will keep updating the download links whenever a new book is issued by the federal board.
Federal board class 11 books in pdf

Download: Punjab textbook board books for class 11
Federal Board HSSC 1, class 11 books 2025
Federal Board books for 1st year pdf
Now you may like the following notes too:
1. All classes pdf book of federal board 2025
2. Federal board books Class 12th
5. 1st year class 11 kpk board and federal board notes