Hello Company USer_OutlookOneWon,
Thank you for posting this case in Microsoft Community!
Based your description, you want to know if Microsoft Read Aloud is available in New Outlook for Windows. I would like to cooperate with you working on this case.
To clarify this case, you may open any one email in New Outlook for Windows. You will see Immersive reader options and please click it will new window pop up to check Read Aloud feature available now.
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For more information and key features supported in New Outlook, you may check this Microsoft article as reference:
Getting started with the new Outlook for Windows
The new Outlook for Windows for organization admins
If you need further assistance, please feel free to let me know, I will keep assisting you.
Your understanding and patience will be appreciated.
Thank you!