I use Faithlife on my iPhone 6 and on my iPad. Sometimes I use the ESV and sometimes the LEB and once in a while the NIV. If I highlight a verse or put a not in one version, is there any way for that highlight or note to show up in all the versions?
Welcome to the forums. Your question is best asked in the iPad/iPhone forums where anyone answering would be likely to provide a screen shot which I cannot. You should see a choice between selection (this book only) and reference (all bibles) before you add a note. Notes by reference provide what you want.
For clarification: notes can be one of two type: notes attached "by reference" and notes attached "by selection." Notes attached by "reference" will appear in all "versified" resources (Including different bibles). Highlights, by definition, are notes attached "by selection" (you select a sentence, word, phrase, or even character) and are therefore only available in the single resource (bible).