<?php
function mymodule_tokens_info_alter(&$info) {
  // 1. New token type.
  $info['types']['extra-details'] = [
    'name' => t('Extra Details'),
    'description' => t('Details for specific nodes.'),
    'needs-data' => 'node',
  ];

  // 2. Tokens for the new type.
  $info['tokens']['extra-details']['example-1'] = [
    'name' => t('Example 1'),
    'description' => t('First example'),
  ];
  $info['tokens']['extra-details']['example-2'] = [
    'name' => t('Example 2'),
    'description' => t('Another example'),
  ];

  // 3. Add the new type to node.
  $info['tokens']['node']['extra-details'] = [
    'name' => t('Extra Details'),
    'description' => t('Details for specific nodes.'),
    'type' => 'extra-details',
  ];
}

function mymodule_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
  $replacements = [];
  if ($type == 'node') {
    if ($details = \Drupal::token()->findWithPrefix($tokens, 'location-loans')) {
      foreach ($details as $name => $original) {
        switch ($name) {
          case 'example-1':
            $replacements[$original] = 'Great example!';
            break;

          case 'example-2':
            $replacements[$original] = 'Another great example!';
            break;
        }
      }
    }
  }
  return $replacements;
}