That Time I Got Reincarnated as a Slime: Tensei shitara Slime datta Ken

[Ryllharu]

If I remember right, they bind them as part of the summoning ritual itself. Curses are applied sometimes, according to the earlier seasons.

I think the kids don't have it because they were "useless," doomed to die, and sent to Ingrassia. They haven't gone into any real detail about the "successful" summonings in the west until now.

There's also a difference between Summoned (the kids, via incomplete, rushed, and "industrial level" rituals) and Otherworlders (e.g. Rimuru). Shizu was somewhere in-between I think, because the demon lord Leon Cromwell summoned her more properly.

Anyone's guess where these three fall.

edit:
I've also been thinking the world map should be posted, but you'd have to redact it.
The only locations you can really include are the Jura Forest, Dwargon, Ingrassia, Yuruzania, Falmuth, and Blummund.
We technically don't know where Clayman and Milim are from.