Yes, the sentence "I’m in chapter 3😄" is grammatically correct. It conveys that you are currently reading or working through chapter 3 of a book, document, or some other written material. The smiley face emoji adds a feeling of positivity or enjoyment to the statement.
Here are a few possible rephrasings:
1. "I'm currently on chapter 3! 😄"
2. "I'm at chapter 3 right now. 😄"
3. "I've reached chapter 3! 😄"
4. "I'm reading chapter 3.


