Apple
Does the iPhone SE (1st gen) support eSIM?
No, the iPhone SE (1st gen) has no eSIM and only works with a physical SIM.
The iPhone SE (1st gen) 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 iPhone SE (1st gen) 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 iPhone SE (1st gen)
Can I use an eSIM on the iPhone SE (1st gen)?
No. The iPhone SE (1st gen) 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.