I would make sure she can really cover that many good if she's tiny & it is cold where you are located. If its warm its not that big of a deal. Smokey had a hard time with 7 LF size eggs and she's a medium size Arucana hen. She could only partially cover some and it was early spring so 30s at night and 45F in the day. She hatched three out. It may have been because they were shipped and not going to hatch. Or it could have been some got too cold on the periphery.
Well she is tiny for a LF Phoenix. She is one that is on the smaller size. These are all bantam sized eggs so she has more than enough room for them. She could really fit over 6 or 7 small-medium eggs. But I don't want to put to much stress on her since she is a first timer.