Appending a DOM element in Ember Octane

I am currently converting some code from older Ember style to Ember Octane, so I'm a bit new to Octane. At the heart of the problem, I'd like to use this.element.appendChild to append a div when the element is inserted, and then select and append an SVG to the div and modify it from there. However, Ember Octane doesn't allow for lifecycle hooks. What's the best way to do this?

For some more detail, this component utilizes D3 to render a graph, so it initializes the setup for the graph by creating a div with the id svg and then selects it and appends an SVG to it, and continues to do D3 stuff to it to render a graph.

I've looked into ember-render-modifiers, but this seems like a bit of a workaround and a copout from refactoring the code, so I was wondering if there was a better way than this.