Hiyori has a melon bread for a brain. Doesn't she know how egoistical kings or leaders from the isekai novels are? Even if you don't read novels like that, it doesn't take a genius to understand that powerful people using you so brazenly and one-sidedly is something very bad either. The best outcome is that they will leave you be. The worst is death. No one will spend resources to send you back when you will lose your worth. The most logical outcome is that you will be treated as a threat. You will be killed or imprisoned. It also wasn't mentioned how to deal with problems of this world. If locals can't deal with them, then it's dangerous. In the worst case, it requires a human sacrifice. Why else they call you a priestess?
Also, working for bastards that "summoned" you (like it is something natural) without harboring resentments is pretty weird. Especially for a modern human.
If the author isn't ready to touch these problems, then this work can only be shallow. Superficial cooking isekai manga doesn't require politics, kings, knights, and epic quests.
So I'm waiting for serious development, otherwise, it will be a shipwreck.