The order code you mentioned — RUT95623B600 — does indeed support eSIM functionality. The device itself includes two SIM slots for traditional SIM cards. You can configure the eSIM as a separate interface that can be used to establish an internet connection. Please note that one mobile modem allows one connection at a time. Here you can find a guide on how to activate an eSIM profile in RUT956 devices.
Additionally, you can setup SIM switch to the next SIM/eSIM if the signal is poor or has no connectivity, etc. For more information, refer to this article:
If you need two SIM cards connected to the internet simultaneously, you may want to consider a device with dual modem functionality, such as RUTX12, RUTM52, or RUTM56. This ensures that two mobile interfaces can be active at the same time.