Yes, your primary number should be able to receive calls if your device allows you to have a SIM and eSIM activated at the same time.
Particular smartphone models have the Dual SIM Dual Standby (DSDS) technology that allows you to remain connected with both physical your SIM and eSIM simultaneously.
However, the number of eSIMs that you can have active on your device will change according to the device model.
For more information, please contact your device’s manufacturer.
Please also keep in mind that data roaming charges may apply to the call service depending on your carrier provider.