Here is the sentence:
Inserted in the group text reply, Charlotte included another selfie with
eerie red eyes.
Very impressive! You recognized that too many words separate the modifier from its target. Inserted in the group text reply, a participle phrase, is currently describing Charlotte when its target should be selfie.
To fix the problem, you could revise the sentence like this: When Charlotte replied to the group text, she inserted another selfie with eerie red eyes.