eSIM carrier profiles

Hello. I am new with eSIM using. We would like to use SIM-E-MFF2-GL eSIM in our IoT devices with Telit ME910G1 modem, and we have few questions.
If I understand correctly this ICs https://www.digikey.com/en/products/detail/hologram-inc/SIM-E-MFF2-GL/12458891 is already pre-registered and I need just place it on the PCB and we can use it as a regular standard SIM. Am I right?
As I know eSIM can support few profiles for different carriers, tariffs and others. Is it possible to add a profile for another carrier (not a Hologram) for this eSIM?
Thank you.