The original problem with dual SIM was that Verizon, when the physical SIM card was used in second hand mode, would let users down to the 2G network, which means low speeds and lack of coverage, among other things. Because of this, Verizon refused to activate eSIMs until the issue was solved. "Wireless customers will be able to enable Verizon service eSIMs as soon as we are sure that you can get the high quality service you expect from us on both your primary and secondary lines," said the carrier PCMag at that time .
Verizon said in October that it expected a solution by the end of the year, and this note seems to support that view. So if you want to use Verizon on your secondary line, it seems you do not have to wait much longer.