Upgrading from Drupal 7 to Drupal 10
Create a new D10 portal. Enable migrate modules.
Enable https://www.drupal.org/project/migrate_upgrade to allow migrations via Drush.
Set up a Migrate Database
$databases['migrate']['default'] = [
'database' => 'drupal7db',
'username' => 'drupal7db',
'password' => 'drupal7db',
'prefix' => '',
'host' => 'localhost',
'port' => '',
'driver' => 'mysql',
'namespace' => 'Drupal\\mysql\\Driver\\Database\\mysql',
'autoload' => 'core/modules/mysql/src/Driver/Database/mysql/',
];