I would like to know if possible, that when an alert expires, it also could disappear from the list.

For example:
Alert gets created that the memory threshold is exceeding 80%, but after a couple of minutes, the memory use drops again below 80%. When this is the case we would like to know if the alert can get automatticaly resolved

Another example: Alert gets created that status of a certain device is unknown, but 5 minutes later this device is back online, also in this scenario I would like to know if the initial created alert can be automatically resolved.

These are just a couple of examples, there can be many more scenarios where issues are automatically resolved without human interaction.
This way we know that existing alerts will need manual investigation.

changing the timeframe of when the alert has to be created is not a possibility, since some issues can be critical and we need to be notified right away

Thank you for your time

Kind regards,
Dominic