RE:RE:RE:Dividend paymentYou can find those kind of details on the Brompton site:
https://www.bromptongroup.com/product/global-dividend-growth-split-corp/
It opens with the "Overview" window but to the right of its button there's a "Distributions" button. Press it to open its window and, scrolling down, you'll see the Record Date (the date you have to own the shares to collect the dividend) and the Payment Date (the date when they actually hand over the cash).
The shares you bought on Mar 4 should have paid you a dividend on April 12. Your total holding will pay on out May 14.