Yes, you can.
When releasing or submitting an approval request
There are character limits for the Title and description respectively.
Please adjust the Title and description so that they are within the character count displayed on the editing screen.
When saving a Draft
There are the following differences between the web Browser version and the mobile app.
Web Browser version
You can save a Draft even for a Manual that contains a cover or Step where the Title or description exceeds the character limit.
Mobile app
When the content saved as a Draft in the web Browser version exceeds the character count allowed for release
As long as it is within the character count entered in the web Browser version, you can save a Draft even if it exceeds the character limit allowed for release.
When the content saved as a Draft in the web Browser version is within the character count allowed for release
As usual, you can save a Draft for the cover or a Step as long as it is within the character limit allowed for release.
Related: What are the maximum values for the various elements that can be registered in Teachme Biz?
https://help.teachme.jp/hc/en-us/articles/6436034396441