In Android 7 (Nougat), there was a special option that allowed for improved granularity in managing notification order, see e.g. this report. I made extensive use of this feature but, alas, it has been dropped. Now on Android 10, I only find two notification classes, "alert" and "silent/gentle".
I have a lot of calendar reminders and messages that are both required to be alerted to me. However, I need the messages (Slack, Whatsapp, etc.) to be ON TOP of all the other notifications, especially on top of the calendar reminders, so that incoming messages do not get lost among the many reminders of a day.
Previously, in Android 7, this was readily feasible by giving the messenger apps "highest priority" and the calendar app "second highest priority". Both generated palpable alert notifications, but the messenger notifications would always be moved to the top and remain there, even as new calendar reminders come in. Currently, the only way to move the reminders below the other notifications is to classify them as silent, which defies their very purpose.
Is there any way to change the order of notifications on a per-app basis within the alert category on android 10? I looked extensively for an Xposed module or custom rom that could do that. So far, in vain. Help very much appreciated!