Hi Butler Keith,
Good day.
After deeper research we have found that this feature is not avilable in New Outlook Open file links directly in Microsoft 365 desktop apps from Teams and classic Outlook , as a workaround you can only preview the links as shown in our previous update.
The New Outlook for windows till now this feature does not available in new Outlook , the new Outlook lacks this feature, thank you for trying New Outlook for Windows and bringing this to our attention, your concern is very meaningful and reasonable. At this point, since new Outlook for Windows is still in active development, we will surely raise your concerns to our Product Development Team and hopefully this can be included in the future update. In the meantime, we sincerely recommend you post your valuable suggestion as an idea on our in-app New Outlook feedback site. To provide feedback, go to Help> Feedback. You can refer to Contact support and provide feedback within the new Outlook for Windows - Microsoft Support .

Our Product Development Team are committed to enhancing the customer experience by continually examining suggestions to include in the design and development of future product upgrades based on your suggestions. Hopefully your suggestion will help many users in the future.
Thank you for your precious time, valuable suggestion and understanding. For other concerns, please do not hesitate to add your post in the Microsoft Community Team.
I hope this helps let me know if this is contrary to what you need, I would still be helpful to answer more of your questions .
Best Regards
Community Moderator