Hi Jayjay
You can apply for DLA but you may be difficult with out supporting documents, you may want to wait for your daughter to be seen by ASD pathway for investigation based on your concerns
Remember the DWP does not know your child, so you have to paint a picture in words explaining your childs condition(s), how they affect them. what help is requires and any aids and adaptions they uses.
Have a look at our Child DLA Claim guide to see if they meets the criteria for an award.
www.benefitsandwork.co.uk/help-for-claimants/dla/#dlaclaims Send in as much supporting documents as you can. Those who help you, get supporting documents from them stating what help they give and why.
Gary