When you consider the typical ages of skills, combined with high ability and higher reading level, is it just developmental asynchrony at play, if a child is slower with phoneme awareness but advanced in oral and verbal skills?

What would you suggest for DD-almost8 who's enjoying reading books at S-U levels (and P-R, too, but is drawn to higher), yet when asked to spell bridge, sounds out 'buh ir idge' as syllables, and says 'b-i-r-i-g-e?'