That is down to the App to implement. Most Apps like Word or Pages, Messages, WhatsApp will move to the next line when you use the enter key on the onscreen keyboard. Other Apps may simply execute an action when you use the enter key. Its down to the specific App to make the enter button go down to the second line. ( 0)
Head over to the Settings app. Tap General and Keyboard. Tap Keyboards, Add New Keyboard, and select Greek. Then, when you want to type the Pi symbol, click the globe icon in the bottom left
Watch the Latest from AppleInsider TV. Open the keyboard in Messages, Notes, or another app. Press and hold on a specific key. If there are extended characters, you'll see a popup with a list of
Go to Settings > General. Choose Keyboard > Text Replacement. Tap on +. Add your shortcut and the complete phrase you want it to trigger. Now when you want to type that word or phrase just type Swiftkey is the best option with a dedicated number row. Worst of the big three for me otherwise. Never use it Gboard you can enable long press for numbers on top letter row. Usually use this, but sometimes flip back to stock. In case you're not aware, you can swipe from the "123" key to the top row to get numbers on stock keyboard (and Gboard) . 404 493 177 212 202 481 313 160

how to get number row on iphone keyboard