I’ve been trying to figure this out for ages without luck. Perhaps someone here has the answer?

I have 3 eSIMs on my iPhone 15 Pro (same config as previous 3 iPhones). My 2 domestic plans are Verizon and AT&T. I have those turned on stateside and everything works great. My 3rd eSIM is Google Fi (full cell eSIM, not data-only). I use the Google Fi eSIM whenever I am overseas. I usually turn off both my Verizon and AT&T lines and turn on the Google Fi eSIM upon landing OCONUS. Unfortunately, this process apparently disassociates my Verizon and AT&T numbers from my iCloud account, and I stop getting iMessages intended for those numbers on my phone.

When I tested this process domestically, I get a little message under settings/cellular that says that my Verizon and AT&T numbers will be removed from iCloud in 30 days, which would work just fine for me (since my trips are usually 2 weeks tops and then I return home, turn them back on, and everything works). This hasn’t been the actual behaviour I’ve seen, though.

Is there a way to keep my domestic numbers associated with iCloud when I turn the eSIM off? How are you folks doing it?