Hi Jessica,
I'm Cherrelyn and I'm here to help you. I truly understand how critical this feature is for your workflow, especially with lengthy documents. Since you've confirmed everything is updated and no extensions are interfering, this seems to be a regression in the recent builds. I strongly recommend submitting in-app feedback directly through Edge Alt + Shift + I and clearly requesting escalation to the Edge development team. The more detailed feedback they receive from real users like you, the more likely they’ll prioritize restoring this functionality.
I hope this will help and if you have any question please don't hesitate to leave a comment.
Warm regards,
Cherrelyn