ChatGPT said:

Got it! The standard red check mark emoji doesn’t exist in Unicode as a default, but you can use these alternatives:

• ✅ — Green check mark (default)
• ✔️ — Heavy check mark (can often be colored red in apps that allow text color)
• 🟥✔️ — You can pair a red square with a check mark for a red effect.

If you want, I can make a proper red check mark image/icon that looks like a true red tick you can use anywhere. Do you want me to do that?