Index: src/wp-content/themes/twentytwenty/assets/css/editor-style-block-rtl.css
===================================================================
--- src/wp-content/themes/twentytwenty/assets/css/editor-style-block-rtl.css	(revision 53677)
+++ src/wp-content/themes/twentytwenty/assets/css/editor-style-block-rtl.css	(working copy)
@@ -306,6 +306,14 @@
 	text-align: center;
 }
 
+.editor-styles-wrapper .block-editor-rich-text__editable.has-text-align-left {
+	text-align: left;
+}
+
+.editor-styles-wrapper .block-editor-rich-text__editable.has-text-align-right {
+	text-align: right;
+}
+
 /* DROP CAP */
 
 .editor-styles-wrapper .has-drop-cap:not(:focus)::first-letter {
Index: src/wp-content/themes/twentytwenty/assets/css/editor-style-block.css
===================================================================
--- src/wp-content/themes/twentytwenty/assets/css/editor-style-block.css	(revision 53677)
+++ src/wp-content/themes/twentytwenty/assets/css/editor-style-block.css	(working copy)
@@ -306,6 +306,14 @@
 	text-align: center;
 }
 
+.editor-styles-wrapper .block-editor-rich-text__editable.has-text-align-left {
+	text-align: left;
+}
+
+.editor-styles-wrapper .block-editor-rich-text__editable.has-text-align-right {
+	text-align: right;
+}
+
 /* DROP CAP */
 
 .editor-styles-wrapper .has-drop-cap:not(:focus)::first-letter {