HTML tags added by CiviCRM's rich text editor is generated as plain text in Views output for fields like CiviEvent description or custom rich text fields. Stripping tags in the Views output doesn't tidy it up:
1 Answer
Based on feedback from Skvare's Mark Hanna on chat.civicrm.org you need to rewrite the field output, using the _value version and add |raw in the twig.
For the event description field, this looks like: {{ description__value__value|raw }}.