I hope the breeder can find a bitch to raise puppies. There are all kinds of FB groups, etc for just this scenario and she might also contact the nearest GR club and see if they will put out to membership.
That would be best case.
Worst case- puppies would get aspiration pneumonia and die.
Worrying about later problems is smart but right now, worrying about them surviving is the real worry.
Without a bitch to nurse them, the breeder will need to provide safe suction activity or they will suck on each other's ears and genitals and that is problematic too. Puppies are meant to nurse pretty much around the clock, nurse and sleep is all they do . Breeder without bitch might use a bottle but that's problematic from an aspiration place. And tubing is a talent- if she does not know how or is not able to fully fill them without overfilling, aspiration is a problem then too. PLUS the very serious timing piece- they need to be fed around the clock every 2 hours and be kept warm. You can do the math, it takes to stimulate potty and tube a puppy about 4-6 minutes. There are 10 puppies. That's approx 3/4 an hour not counting making formula (which is generally constipating) and swapping them out and that's every 2 hours so human sleep and keeping area clean etc gets an hour every other hour at most. It is a very hard job. Finding a lactating bitch is the best case scenario, and renting her or paying the owner to raise the orphans is the best end result.
Assuming she is able to raise them without pneumonia, constipation is a problem, lack of colostrum is a problem and I hope they were able to pull serum off the bitch before she died and at least gave that to the puppies. It is an enormous job to raise orphans and so heartbreaking to lose one's precious girl in that way. I'd also offer this breeder much support emotionally because she is probably beating herself up over ever doing the breeding. And it's all too common to lose a girl in a section or shortly after. If you can lmk by PM where she's at I can do some legwork for you this morning and hopefully help her find a bitch.