The new e-SIM is much smaller than the conventionally used nano SIM. Unlike other SIMs, it is inserted as a connecting chip during device manufacturing. So there is no chance to open or install it. It can also be called a fully amazing digital SIM card.
The number of eSIM-supported phones is very less. If you are using an Oppo Reno8 Lite phone, you will not benefit from eSIM because the phone is not a SIM-supported device. But you will get the benefit of WiFi calling on this phone.