It also depends on why the got divorced because usually in the Coptic Orthodox Church we really don't have divorce yet there are two acception a to this rule so if it is by those two acception then I Believe they can continue to take communion
Try a book called "the service of the deacons" it's an amazing book with all three languages explains everything that is going on during the liturgy and also when to hold the censor,light the candle, hold the cross, etc.