Simple 1040 filing example?

Yes, interesting.

As an addendum, as I don't receive W-2s, TaxAct directs me to something called the worksheet FEC (Foreign Employer Compensation & Pensions).  Indeed, the TaxAct link below (apparently from 2018) says that FEC should be completed if you don't receive W-2s.  It says the income will appear on Line 1 of 1040, but bear in mind the URL has 2018 in it so it's likely a little dated; were it written today in respect to 2022, it would presumably say Line 1h (?).
https://www.taxact.com/support/840/2018/fec-worksheet-entering-foreign-earned-income-in-the-program


Given the above, I might reach-out to TaxAct and just ask them to confirm that my foreign earned income is supposed to appear in 1h instead of 1a.

I was wrong - you are right. Methinks off to buy new reading glasses! These are the CCH Axcess instructions if you are curious! https://support.cch.com/kb/solution/000259792/000259792?IsNewArticle=true&language=en