You need to use Genshin Impact's built-in camera function to complete "Iron Ingot Meets Ziwei".
The global quest "Iron Ingot Meets Ziwei" in Genshin Impact is pretty straightforward on paper - just visit a handful of places marked on the map to see if either is suitable for stargazing. . The point is, Iron Ingot wants you to take a photo of every view. Here's where things can get confusing for those of us who had no idea Genshin Impact offers a full photo mode.
You see, there are two forms of camera in Genshin Impact (three if you count the Five Flushes of Fortune event camera). Once is unlocked via a side quest in Liyue, and is mapped to your Gadget Key when equipped. This camera is used to capture quick screenshots, and there isn't a lot of nuance. The second, more versatile camera can be found in the main menu of Genshin Impacts.
Simply click on Escape / Start (or tap the appropriate icon on the mobile) to bring up the Genshin Impact main menu. On the left side, above the Reviews icon, is a camera. Yes, it's been there all this time. Click on it to open Genshin Impact's photo mode, which freezes the game and lets you change the setting, your character's posture, emotion, and a handful of other settings to capture the best screenshot possible.
This is also how you will take photos of the two panoramas of the worldwide quest for the rite of lanterns "Iron Ingot Meets Ziwei". Just head to the locations marked on your map, open the main menu and select the camera. It will automatically align with the quest landscape, and all you have to do is take the photo. Once you have acquired both photos, return to Iron Ingot to complete "Iron Ingot Meets Ziwei".