Dual Sim- International Fees?

I had a question/need some advice on my dual sim setup. I’m moving abroad and have gotten a new phone— I’m planning to get a local sim card one I’ve moved, but I’d also like to keep my US number alive. If I port over the US eSim to my new phone, and for the US number I disable cellular data/roaming but keep Wifi Calling enabled, while having my local sim fully functional, will I be able to receive texts such as bank verification codes without incurring international fees?

Is there a risk of being charged internationally with this sort of set up? How would I avoid that? I heard calling and asking AT&T used to get them to manually disable cell service abroad for your number, but I called recently and they told me that option is no longer available.

Thank you in advance!