Good morning, Zachary!
Thanks for reaching out to our Microsoft Community Forum.
I understand that you're missing the Microsoft Loop button in Word Online.
Microsoft Loop is indeed generally available for customers with Microsoft 365-Business Standard, Business Premium, E3, and E5-on web and mobile according to the link below.
That same link does also state that some components are rolling out early next year. Thus, it's highly recommended that you keep monitoring the article below and even commenting on it for updates on features that don't work for you.
In addition, send us your feedback in the app to help us shape the journey. In the bottom right corner, select Help> Give feedback.

On Android or iOS, tap your profile picture at the top left to find Help and feedback.
Thanks again for choosing Microsoft! We’re here when you need us.
Sincerely,
Glenn Rue
Moderator
Microsoft Community