There are also widgets that could handle this. See this one: https://appstore.home.mendix.com/link/app/34947/Finaps/FormatNumber
or this one: https://appstore.home.mendix.com/link/app/2790/JAM-IT/Bootstrap-Input-Addons
But in my humble opinion both widgets should not be necesarry and the platform should support this. Since the loss of the currency attribute the platform has not really improved for something so simple as displaying currencies.....
Regards,
Ronald
In a datagrid you could do it with CSS. For example
.mx-name-columnName > div:after {
content: '€';
}
That would work similarly in a dataview readonly attribute.
There are other options depending on the specific use case...