Xiaomi
Does the Poco F4 support eSIM?
No, the Poco F4 has no eSIM and only works with a physical SIM.
The Poco F4 does not have eSIM. For mobile data abroad you will need a physical (travel) SIM with this device, or roaming from your own provider.
Source: GSMArena
Check your Poco F4 for an eSIM yourself
Dial *#06# on your phone. A 32-digit EID number means your phone has an eSIM. On iPhone check Settings > General > About; on Android check Settings > SIM manager.
Frequently asked questions about the Poco F4
Can I use an eSIM on the Poco F4?
No. The Poco F4 is not eSIM-compatible and only works with a physical SIM. For mobile data abroad you'll need a physical travel SIM with this device.