Index: wp-content/themes/twentytwentyfour/theme.json
===================================================================
--- wp-content/themes/twentytwentyfour/theme.json	(revision 57139)
+++ wp-content/themes/twentytwentyfour/theme.json	(working copy)
@@ -639,6 +639,7 @@
 						}
 					}
 				},
+				"css": "& :where(p) {margin-block-start:0;margin-block-end:0}",
 				"spacing": {
 					"padding": {
 						"bottom": "var(--wp--preset--spacing--40)",