When you copy an paste from Word in the Moodle editors the "Style" Tags are deleted, so the formatting from Word is lost.
Steps to Replicate:
1. Create a document in "Word" using different changes in the text format. (I attach an example)
2. Create a page resource or anyone using an HTML editor.
3. Copy and paste the content from the document created in Word
4. Save Changes
5. When reviewing the content of the page and comparing with the text in word, we can see that some styles of the format are lost. Like the size and the type of the letter, the justification of the text, etc.