As you can see in my post https://community.e.foundation/t/random-select-sim-card-notification-on-fairphone-2/2600 a while back using FP2 numbers of physical SIM cards where shown. This was a slightly different issue but as long as I used the FP2 with the configuration for Calls preference “Ask every time” I got both numbers shown.
If you meant by setting of my eSIM: Settings / Network & Internet / myeSIM / pencil icon / SIM name & color there is no number at the entry “Phone number on SIM”. At the same place in the settings of the physical SIM there is the number displayed.