This is nothing new. In a mixed marriage the Catholic spouse is obligated to insist that the children are raised Catholic but if he fails, that does not open him/her to any censure. Whoever marries into British royalty obviously has considered the many implications of such a step, including the peril to the childrens’ souls. May God be merciful in His judgment.
The noteworthy thing here is the Act of Settlement inserting itself like a ghoul at a wedding; whatever good it ever did is now void due to the evident apostasy of the Church of England which has become the laughingstock of Christendom.
What ever good was ever intended by it?
It was created to exclude James III and VIII. The irony is that the entire line that was grafted in failed. Then they had to scuttle around and put Germans on the throne rather than their Catholic englishmen.