On the internet it is claimed that there is a history of Christian missionaries re-identifying representations of pagan divinities as objects of licit Christian cultus.
Well, I'm old enough to be wise enough not to assert universal negatives. So I won't claim that this could never have happened anywhere. But I would like to be shown some evidence.
Because the ancient world provides interesting examples of quite the opposite. It would be very easy for a statue of Isis with Horus upon her lap to be recycled as Our Lady. Perhaps the easiest place for this to have happened would have been in the home teritory of Isis, Egypt ... where, indeed, the cultus of the Theotokos was to find enthusiastic adherents earlier than it did in some other places.
But the evidence is that when Christians converted an Isiac temple to the true faith, they did not dedicate the church to the Mother of God.
On the contrary: the christianisation was performed by placing the relics of martyrs within the buildings, and offering them cultus. The building was regarded as dedicated to those martyrs.
This is completely in line with what S Bede records S Gregory as Magisterially commending at HE I: 30.