yeah that's potentially fraud because the timing of it suggests you abused the province's PNP program for easy PR. you signed a schedule 4 doc in your PNP application declaring your intention to reside in the nominating province - but failed to do so. the provinces have various detection mechanisms and their integrity units can come after you at any time. IRCC will come to know when you apply for citizenship and see your convenient and immediate address change after landing.
ps you can dispense with the "someone" and "asking for a friend" stuff, we know it's you, but I don't care.