The most reliable "fix" to restore this font without rooting your device is to use a font management tool like to bypass these restrictions. Method 1: The Official Galaxy Store Fix (Easiest)
Some custom kernels, such as the popular Magisk kernel, can help you fix the issue with the Choco Cooky font APK on Android 12. These kernels can provide a workaround for the font rendering system changes in Android 12. choco cooky font apk for android 12 fix
He found the file: Choco_Cooky_v4.0.apk . The most reliable "fix" to restore this font