You can read about the asset allocation for StashAway here (made by a Singaporean investor). I don't know if the AA will be identical to SA Malaysia.
https://financialhorse.com/stashaway-1/
You'll be subject to the 30% withholding tax for US-domiciled funds.
https://financialhorse.com/stashaway-respon...ts/#comment-181
StashAway MY, New instrument for Malaysian?