In the big scheme of things, I would say this isn’t a dealbreaker or a good reason to find another Nanny.
She sounds like she just needs a little direction…or maybe more.
The next time that she asks you what to give your child for lunch - simply respond that you trust her judgment/choice.
Remind her there are many options in the refrigerator & simply leave it at that.
You can also take a similar approach regarding daytime activities + outings.
If she asks you what she can do that day w/your child, simply suggest if she needs some craft ideas there are specific websites that are good for this.
You may have to suggest a few.
She may also ask you for help in where she can take your child during the day.
How well does she know the area?
If not too well > you may have to suggest a few places that are kid-friendly.
Bottom line:
Leave more of the decision-making to her and tell her that you trust her good judgment.
This could help build not only her confidence, but creativity as well.
Good luck!!