can I swap esims between iphones daily

Suspect that it would never be “easy” as presumably the business’ name is on the the business’ carrier account.

From a carrier perspective, this would certainly “look” like SIM-Swap fraud; something for which all carriers should be “on-guard”

Have you possibly considered and tested call-forwarding; to simply send your personal calls to the SE while on-duty ?

Both VZ (I’m told) and T-Mo provide subscriber eSIM self-servicing via their customer account management websites.

If both lines were in your name and on the same carrier, I’d be much more optimistic of your prospects for success.

I also “wonder” if the business phone (SE) is even “carrier unlocked” so as to be able to use multiple carriers ??? (subsidized devices are a common method to reduce up-front costs - an important consideration for ANY business when purchasing mobile devices and service plans)

Looking forward to hearing more of your experiences.