Stuck at Drupal Version 10.1.8: Cannot Update Further

Troubleshooting Drupal Update Stuck at 10.1.8 (Drush 11.x Conflict)

1. If running "composer update" fails to update Drupal past version 10.1.8, check your installed Drush version.

2. If you confirm that Drush version 11.x is installed, remove it using the command:

composer remove drush/drush

3. Next, reinstall Drush (this command will typically fetch a compatible version): 

composer require drush/drush

4. After successfully reinstalling Drush, attempt the Drupal update again, usually by running "composer update".