Just starting process to upgrade kiwitrees (The Royals, first)
Your notes indicate 5.6+ is okay yet the admin panel shows a note that my 5.6.29 is no longer supported and should be upgraded. I’m in queue with my web host about 7.0 and whether to upgrade. Your notes say it’s not necessary yet.
There are no contradictions there, if you study the words, and follow the link to the php page (from the Admin dashboard comment).
PHP 5.6 is no longer supported – by PHP – EXCEPT for security fixes which will continue until the end of 2018. Hence it is ADVISED to upgrade, but not REQUIRED.