As that definition highlights, purvey is a verb. It is grammatically incorrect to say "not the purvey of the Safety Regulator". Unless you are a graduate of the Marjorie Taylor Greene School of Just Using Words That Sound Similar, the appropriate word to use in that phrase is the noun, purview.
Sorry about the continuing drift, but it is hopefully a little amusing in an otherwise serious thread.
I once read a scholarly paper which was very well researched and convincing, but the author at one point said that: “X research was done under the hospices of the Acme Research Institute”. No dictionary would convince the author that he meant “auspices” rather than palliative care homes.
PRuNe is fertile ground for ‘allot’ of ‘mute points’…
/Drift OFF with my apologies.
Fight the good fight, Rex boys and girls.