Hello @Zigmatism , welcome to the forum.
The Document app is a component of the open source OnlyOffice app. So the features are not made by the CryptPad team. (Put in simply) CryptPad adds end to end encryption and integration into the CryptPad workspace and strips some code for security reasons.
So I'm sorry, that your feature request can't be implemented, since this would mean to change the OnlyOffice code itself. I hope you see this based on my explanation.
Disclaimer:
I am NOT part of the CryptPad team and I do not speak for the CryptPad team. I am a user helping other users. I got moderation user rights for the forum from the CryptPad team to help a bit, because we all are the community, but that's all.