One general comment on tax efficiency of dividends in retirement:
You will likely get back a lot less with DA-1 during retirement, as your income is likely to be low enough to have a lot lower average tax rate than 15% (this is important for the calculation of DA-1 the tax office does). And if you don’t pay as much tax, there is no tax credit to be had, so you lose out on extra DA-1 with high US fund dividends.
If more dividend focus in retirement Switzerland based Swiss equity funds are most tax efficient, as you will have no withholding tax (you always get it back as a Swiss resident), focus for ex-US equity on Ireland domiciled funds, and for US stocks US domiciled is still most efficient.