So something very funky happens when I use server side addSelectOption. I can't pass a null or empty select option. The trick I found is to instead add the select option client side using insertSelectOption, which a bigger pain to get around this gap.

The issue I'm facing is that I can't add a select option to a whole sublist column. It seems like the api only support line by line. Is this a correct analysis?

I'm really contorting quite a bit just to be able to have a null or empty value on a select field. I need it to ensure that the mandatory field validation triggers.