We also are facing this issue. I understand that calendar reminders are not the most appropriate way to list tasks or things which still need to be addressed, but this is how people have done things for years. I am trying out the "To Do" tab in Outlook to see how that performs but users are still wanting to have the same reminders experience as they had in the Classic Outlook.
I hope this feature is restored. Failing that, maybe having an option to convert a reminder into a to-do task? However, I do have users asking me if tasks will automatically appear in reminders and how to manage so that these also don't disappear.
Its frustrating 😞
