Open M365 Documents from the Finder Webpart in SharePoint Preview Mode

Web part name (as shown in web part properties) to which you’re suggesting an enhancement
Finder

What is current web part behavior (or look) that doesn’t work for you?
Current Webpart behavior is that it opens .docx documents in Word Online.

> Have a screenshot (please do not include confidential info in your screenshots)?

What would you like the web part behavior (or look) to be?
We want .docx or any M365 documents to open in Preview mode.

> Have a sketch or a mockup?

What is the scenario for which you need the suggested new look/behavior?
All other formats open in Preview mode. Only M365 Applications open in their Online environments

Thank you, everything is clear and we will post an update here when ready.

We have an update from developers after some prototyping was done.
It appears that when document preview window is closed, it always redirects the user to the library where the file is was opened from (as opposed to staying on the current page, for ex.: page with a finder web part on it).
Since out-of-the-box preview is already invoked from the library, closing the preview keeps the user in the library view by default.
With that, unfortunately we were not able to implement this request.