Samsung
Does the Galaxy S21 FE support eSIM?
No, the Galaxy S21 FE has no eSIM and only works with a physical SIM.
The Galaxy S21 FE 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 Galaxy S21 FE 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 Galaxy S21 FE
Can I use an eSIM on the Galaxy S21 FE?
No. The Galaxy S21 FE 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.