Welcome to BYC, so glad you've joined us.
You can certainly place eggs under her at this point and she *should* hang in there and see the hatch through -- that said, there is never any guarantee with a broody and some will throw in the towel sooner than others....if that were to happen do you have an incubator that you could move the eggs to to finish them?
The other concern I would have is the eggs themselves - you say the package was delayed, depending on when the eggs were laid in relation to them being shipped, this added time in shipping may be pushing them beyond the optimum viability age for fertilized eggs, and the extra time in shipping also means more time that they may be being exposed to rough handling that takes a toll on the viability of eggs.