You mean something more complex than a message, is is what you mean with “no content anymore”?
You could maybe try to feed html in the msg, didn’t tried personally
Otherwise that’s the source code of the component, maybe you will find something there: https://github.com/ionic-team/ionic/blob/32cf9c7d7d0fe6adde7e41ce25c224e5488fb7be/core/src/components/loading/loading.tsx