This question has two answers I think.
The answer "in print" would be that you must have love and respect for your DFd parent. Normal family relationships remain.
The other answer that is not a quotable quote, is that a DFd parent is spiritually dead and in some undefined way "less".
Teenagers challenge authority and draw away from their parents a lot of times during the teen years.
With slight encouragement from the Witnesses it is easy to see how a 13 year old could seek their own counsel, so to speak.
You may need to address this through your lawyer depending on how things go but one thing is for certain...
you can make loads of fun for your daughter during your scheduled time together.
Fun movies, access to music she loves, her own space, just whatever she is interested in that is harmless and yet not easy to do in the Witness environment.
You didnt mention if you are hoping for a reconciliation from your separation or whether you are seeking reinstatement but naturally that would factor in to what you feel comfortable allowing your teen in your home.
My best to you, the teens years are interesting!