Time lapse mode doesn’t show on iphone 12 pro

It would be better if you can please re-post with a screenshot, in order to understand the phenomenon better. Images / pictures speak louder than words. Do not provide any personal credentials, such as email id, apple id, IMEI number, Serial Number, Phone number, Order ID, if you are sharing a map ensure your location is not identifiable. Etc.

Purchase Apple Products, from an  Apple Online Store, Apple Retail Stores, and many Apple-authorized resellers and wireless service providers.