Thanks @NimashaJain . But I would like to change the cookie duration e.g. for the AMCV Cookie and I would like to set the duration to 30minutes until I know I have the users consent, then I would like to change the duration to 2 years. But unfortunately I haven't found a solution for this in your link.

Yes, that is correct. Alternatively, you can also check using the browser's developer console. Below is a screenshot for your reference.

@sophieg10675163 ,I believe now AEP doesn't let the users who already opted out earlier, and they have changed their mind to opt in again, in this case we see an error message in the console, as platform doesn't supporting this feature. It could be a reason for the increase in the bounce rate. Also, you might need to keep an eye on the number of event calls triggering on the page-load, analytics usually treats the case as engaged but we might be triggering multiple server calls based on business...

Once the user with Adobe ID is deleted from Experience cloud admin console for your company means that user won't have any product access then that user won't be able to login to any product or its data for your company.