The psalms in the Septuagint have 151 chapters but when I set up a reading plan for psalms using the Septuagint it will only do the standard 150 found in the Masoretic versions of bibles.
Psalm 151 is treated as a separate book in most editions. What version are you using?
Lexham English Septuagint LES - Open up the book of Psalms and it shows 151 chapters which is what I would expect.
Your canon is determined by your highest priority Bible. I get Verbum to handle the 151 Psalm with the NRSV as my preferred Bible by entering the Bible range "Psalm 1-Psalm 151". I suspect I would also get it by making the LES my highest priority Bible but I did not try that.
