There are a very few elements of an ops manual which do, as you suggest, get 'approved'. However, the FTL section is not one (to the best of my memory when I last did a UK operator's manual), and CAP371, a guidance document which happened to contain some examples of possible schemes, was never 'legally binding'.
Yes, the CAA certainly make a fuss about manuals submitted, but I find it's better to consider that one reaches a point at which they stop making objections...
Other authorities, in Europe and elsewhere, do 'approve' manuals...