Hello,
iPad now handles text selection in different way. Instead of long-pressing on some text to display a magnifier, you now simply pickup the cursor and place it where you would like. If you double-tap a word, the word will select. If you triple-tap a word, the sentence will select. If you quadrupole-tap a word, the paragraph will select.
You can also use iPad’s trackpad mode. With the on-keyboard full sized, touch 2 fingers to the on-screen keyboard and pan your fingers around. This will move the cursor. If you double-tap with 2 fingers then the trackpad will enter text selection mode.