With iPadify, you can have access to some features that are exclusive to iPad, on your iPhone.
Currently, iPadify enables the following features:

• Sideload any iPad-only app such as Playgrounds or Photoshop using iMazing, iTunes, or similar
• Native picture-in-picture in Safari, TV and other places

NOTE: There is currently an issue that can prevent installing iPad apps on the iPhone with this tweak because it's not resetting the installd daemon properly. If you still can't install apps through iMazing or similar after installing the tweak, try SSH'ing into your device and running the following command:

killall -u _installd installd