We can have notifications on the mobile APP, TTS, Persistent, etc but why not in a dashboard that is very easy? Maybe just a card that is dynamic that you only see when you get a notification and then it become visible. You then can action it. So when running with fully kiosk you can see the notifications.
There is the persistent notification indicator in the sidebar, are you saying it is not visible enough?
I hide the sidebar and top bar on my android tablets. He mentioned fully kiosk so i guess OP has a similar setup.
Ah, yeah missed that detail.
Yeah, a few people have requested this and I can see it would be a nice feature. This way all HA users can customize their dashboards and have the look they would like. I not sure how HA would like to do it so I leave it up to them maybe even pop up for critical and then they can use it for so many things.
Fire Alarm / Smoke Detection
Water Leak
House Alarm
Washing machine finished
Front door bell - pop up maybe with camera image
Gates door bell - pop up maybe with camera image and action buttons to talk and open gates.
I think careful consideration from the HA team would be required on how this would be done but I think if they get the right road map it would really enhance HA.
Blacky 
I will mention you can kind of do something like this already with the logbook card. It’s not obvious but you can pass it any kind of fake entityid that you want:
type: logbook
target:
entity_id:
- log.critical_messages
Then if you fire a logbook.log action:
action: logbook.log
data:
entity_id: log.critical_messages
name: Alert!
message: Bad stuff is happening!
It will show up there:
Ive tried that myself but it gets messy and hard to read because we cant remove the “triggered by” bit. I wasnt aware of the log.critical_message the log book does get along way there, thanks for sharing that. Is it always critical or are there other levels?
That’s a completely arbitrary string, it means nothing other than I just made it up. You can call it whatever you want.
I think the icon comes from the domain though, so if you want to call it something like sensor.xxxxxxx it will have the eye icon, etc.
Yeah that makes more sense, than what i was thinking there thanks!