Just like with other entities in Markdown that don't have a counterpart in Gemtext, we need to come up with some translation ourselves.
What I normally do by hand is when I find a non-flat list is I translate each depth level into a level of outline. It is not a generic solution and actually I don't think it should be implemented like this.
I think an acceptable translation would be to insert line breaks and pad each depth level with a number, this way
1. Introductory questions about overall background.
1. Music, computers and work at REDACTED.
2. Working with humans in non-tech
1. at work with REDACTED.
2. in an activist / advocacy group with REDACTED.
3. How it helped to make a jump to become a tech lead.
1. Introductory questions about overall background.
1.1. Music, computers and work at REDACTED.
1.2. Working with humans in non-tech
1.2.1. at work with REDACTED.
1.2.2. in an activist / advocacy group with REDACTED.
1.3. How it helped to make a jump to become a tech lead.