Just contacted Verizon about eSIM.
Deanna: We're expecting Apple to release an update to Dual SIM in December to support CDMA networks, such as Verizon, on both lines. Once it's available, we'll be sure to let everyone know!
Deanna: Right now, we are waiting to ensure we're confident that you'll receive the full suite of voice and high-speed data services you expect from us on both lines. Once we are confident in that experience, you will be able to activate your eSIM with us.
Deanna: The XS, iPhone XS Max, and iPhone XR are eSIM capable - we're just waiting for Apple to smooth out the software kinks for CDMA carriers before we support it