Hi @da1ve,
To capture the updates of SharePoint list items, there is a default field "Modified". Once you update an item, the Modified field will be written by the current date time.
So we could create a variable to compare the current time with the "Modified" field, once "Modified" field is equal to the current time, display a banner message telling that there is updates and make the specific row bold with red font color.
Inset a Timer and set the following property:

Set the OnStart property as below:
If(Text(ThisItem.Modified,"dd/mm/yyy hh:mm:ss") =Text(Now(),"dd/mm/yyy hh:mm:ss"),Notify("Record"&ThisItem.ID&"has been updated!",NotificationType.Success));Refresh(YourList)
Set the TemplateFill property as below:
If(Text(ThisItem.Modified,"dd/mm/yyy hh:mm:ss") =Text(Now(),"dd/mm/yyy hh:mm:ss"),Red)