Anyone ever done a custom script to export BOMs in the indented format?

Not sure what you mean by "the indented format", but what exactly is the ask/use case?

You can use the BOM Inquiry screen to export BOMs, but it flattens it and loses the indented format we're using. So Subassemblies are indented under the Assembly, etc.

I have written code that prints the boms and has columns that indicate bom level rather than an indentation, but same concept.

That sounds like we can use it too. Following