Hi @BethDa
Workfront's field character limits may vary depending on the type of field and configuration. As of current version, the character limit for a dropdown list in Workfront is indeed limited: option names can be up to 70 characters long.
If you need to display longer text, you could consider utilizing a text area or note field instead, as these field types allow for a much larger number of characters.
Unfortunately, if you have a necessity to display longer characters specifically in a Dropdown list, this cannot be customized as it is controlled by Workfront's system configuration.