Free iPhone Xs and iPhone Xs Max Mockups has been made by three designers Ruslan Latypov, LS Graphics and Dima Panov. This is in six different material with color changing and has 6000×4500 px resolution. This is really easy to use.
Shadows and reflection can be adjusted accordingly and there are more than 100 stylish components for your web project so can be used accordingly. Mockups can be changes as well with just few clicks.