Open the Settings app on your iPhone
Tap Screen Time
Tap Content & Privacy Restrictions
Enter your Screen Time passcode if prompted
Make sure Content & Privacy Restrictions is turned on
Tap Content Restrictions
Tap Apps
Allow apps rated 12+ or higher if needed
Go back to the main Settings screen
Tap Privacy & Security
Tap Camera
Make sure Snapchat is allowed to access the camera
Open Snapchat
Tap your profile icon
Tap the gear icon for Settings
Tap Additional Services
Tap Manage
Turn on Filters if the option is available
Check that Location Services are enabled for Snapchat in iPhone Settings
Open Settings
Tap Privacy & Security
Tap Location Services
Tap Snapchat
Select While Using the App
Turn on Precise Location if needed
Restart Snapchat after changing the settings