patched drupal core for user email on registration https://www.drupal.org/project/drupal/issues/3002019

composer.json

@@ -206,6 +206,9 @@
             },
             "drupal/term_reference_tree": {
               "Term Reference Tree: Re-implement Track List https://www.drupal.org/project/term_reference_tree/issues/3064280": "https://www.drupal.org/files/issues/2021-07-16/3064280_bring_back_tracklist-15.patch"
+            },
+            "drupal/core": {
+              "Register a user without email verification should still send an email https://www.drupal.org/project/drupal/issues/3002019": "https://www.drupal.org/files/issues/2019-08-30/3002019-n11.patch"
             }
         },
         "drupal-scaffold": {

composer.lock

@@ -9559,8 +9559,7 @@
             "support": {
                 "source": "https://git.drupalcode.org/project/mailgun.git",
                 "issues": "https://www.drupal.org/project/issues/mailgun"
-            },
-            "time": "2020-11-08T21:01:21+00:00"
+            }
         },
         {
             "name": "drupal/maillog",