You can automatically convert co-ordinates (https://www.sfml-dev.org/tutorials/2.4/graphics-view.php#coordinates-conversions) amongst different views by mapping from one view to pixel and then mapping from pixel to the other view. Note that this rounds to the nearest pixel.
sf::Window window;
sf::View view1;
sf::View view2;
sf::Vector2f pointInView1;
sf::Vector2f pointInView2FromView1;
sf::Vector2i pointAsPixel;
// ... (set up views and pointInView1)
pointAsPixel = window.mapCoordsToPixel(pointInView1, view1); // convert from view1
pointInView2FromView1 = window.mapPixelToCoords(pointAsPixel, view2); // convert to view2
It might just be easier (and more accurate) to calculate the conversion manually, of course ;)