I have to say, I'm a little confused about what you are asking.
Do I have this right?
- you applied for your daughter's UK passport
- 3 months later, the passport hasn't arrived yet
- In order to process her UK passport, they are now asking for your husband's birth certificate, daughter's US birth certificate and CENOMAR
- you have now sent all 3 of those documents to them?
- you are wondering if you can use her consular report of birth abroad as proof UK citizenship instead of her UK passport (which hasn't arrived yet) for some kind of application for something?
If you're applying for a UK fiance/spousal visa for yourself, you do NOT need to provide any kind of evidence of your daughter's UK citizenship anyway. So, you just need to make sure her UK passport arrives before she flies to the UK to live, so that she can enter the UK as a UK citizen.
So, you can go ahead and apply for your spousal visa without needing either your daughter's UK passport or her birth certificate or her consular report of birth abroad.