Brian1888
Did the Decision Letter say what the Effective Date of the Decision was?
If it was June 2022 then there should be backdating and you should have heard about it by now, contact the DWP for an update.
If there is no Effective Date then the Decision applies from the Date of the Letter and there will be no backdating. You should still contact the DWP as the letter , from your post, does refer to backdated money.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
