May I ask a question? Why do you have to draw a sequence diagram with draw.io?
This response below is not going to answer your question.
Previously, I was using draw.io to draw sequence diagrams. I didn't have "fancy" setup. It was pretty straightforward. I drew diagram components, like actor, boundary, control, message, and lifeline and connected them one by one. This took so much effort and time. Then, I moved on and used PlantUML [0]. This tool helped me to produce a sequence diagram using text. The text will be rendered into a diagram. I didn't need to draw. It saved my time a lot.
This response below is not going to answer your question.
Previously, I was using draw.io to draw sequence diagrams. I didn't have "fancy" setup. It was pretty straightforward. I drew diagram components, like actor, boundary, control, message, and lifeline and connected them one by one. This took so much effort and time. Then, I moved on and used PlantUML [0]. This tool helped me to produce a sequence diagram using text. The text will be rendered into a diagram. I didn't need to draw. It saved my time a lot.
[0]: https://plantuml.com/sequence-diagram