The Fixed Contribution feature seems to ignore earned income rules for Roth IRA, and I suspect Traditional IRA.

I’m not certain if it ignores the HSA income rule (which is that there needs to be some income of ANY kind)

I would expect the earned income rule should apply to all Roth and Traditional IRA contributions, regardless of “income limit” rules selected (Backdoor Roth, US Limit, Custom, none, ).

I suppose if you needed to add the option to ignore “earned income” rules you could add that as a separate flag, but I cannot conceive of any scenario where this would be desirable. As far as I can tell, it would only lead people to make mistakes.