International Living Community

We relocated to Spain 3 years ago. We purchased our iphones before leaving the US so they were unlocked and we could get Spain SIMs. We gave up our US mobile numbers. Those numbers are still on some of our bank and other financial accounts as the only mode of two factor authentication. It's an inconvenience that I want to fix. I'm looking for advice on a provider from whom I could get a US number, likely via eSIM, with which I would update my financial accounts, and be able to receive any necessary authentications in Spain by switching the eSIM on as needed. I've looked as US Mobile which seems viable. Any expert advice out there on which mobile company has a plan that will be able to send texts to a US number on an international network? I'm in Spain and do not currently have a US number (ie can't port to Google.)