Even if there was a golden ticket to give you a seemingly instant restore of the documents, I wouldn't jump right into that. Instead,
Consult Microsoft's support.
Depending on your subscription, you likely are able to get the best available support from them. Also, as we are in the context of SharePoint Online, due to the progression of continuous improvement by Microsoft, I'd rely on a word signed by them in the last hand.
The following is a reference for a guidance of addressing the issue with MS, available in an article of an even worse situation. (How to recover missing, deleted or corrupted items in SharePoint Online and OneDrive for Business):
When you open a request, provide as much additional information as
possible to describe your issue. For more information, see Contact
Office 365 for business support. Include the following information in
The full URL for the affected site collection or
library. For example:
The names of several of the affected items.
For files, include the
file name extension.
The date and time when you think the item was
last in an uncorrupted state.
Refer to the Contact Office 365 for business support - Admin Help article when contacting Microsoft.