Seed Bound
When Germinating your seeds you suffer from seed bound when the seed coat sticks the first leaves
A seed germinates when the seed coat is softened by warm wet soil
This allows water to hydrate the plant inside and if the root detects nutrients will grow its shoot
If when germinating your germinating media is not warm enough the seed coat will either not soften fully or start to harden and stick to the plant
Ensure the temperature is close to 27-30c in the very early stages, be consistent on the temperature through the whole day and cover the seed tray to trap moisture keeping humidity at 100%
This will ensure the seed coat is softened correctly and will stay soft so when the seedling starts to grow it will naturally discard the seed
If you do have you can uncurl the seed from the leaves, its delicate and requires a knack, best to leave for a few days to see if it drops off naturally, if not try to remove from the stem over and under the leaves stuck inside - its not easy but achievable, most likely will snap the leaves off if not tried before
Sometimes its best to leave on and let the leaves grow - which is common place, once the first leaves get a little bigger and stronger try them for better success