Well two recent anime are probably good references, "That time I was reincarnated as a Slime" and "How not to summon
I'll admit I was mostly thinking of Konosuba when I saw the prompt (and yes, I guess I totally forgot what Yuri means).
One really nice thing about Konosuba's setup is that the setting's gods are directly involved in the Isekai process. The protagonist dies, a goddess from the destination world offers to let them skip the normal afterlife/reincarnation process to be a hero in their world, and even offers a powerful "cheat" item to improve their odds. Then, as we see the story unfold we can see the goddesses have their own religions and followers in the world.
Actually, what if there are multiple demon lords and queens all fighting eachother in the world and the Demon Queen is the one who summons or resurrects the heroine?
Like, at first there was one demon Lord and his lieutenants trying to conquer the world, then a shining hero was summoned and slew him, then all the lieutenants started fighting eachother for power (perhaps even sealing the original demon Lord away themselves because they hated working under him) and while the demons are all stupidly fighting eachother, the various good guy races set up a bunch of sacred barriers that bar demons from their land?
Each barrier or land-affecting spell weakens or repells powerful demons or monsters while letting weaker ones through, justifying why monsters are stronger in some areas.
The demon Queen meanwhile realizes these barriers limit her ability to actually invade human lands (most demon demon leaders send their strongest monsters to fight other demons while only sending the weak ones at the protected human lands). So, she makes a plan to summon a the heroine from another world, give her one or two pieces of strong equipment, and send her to either infiltrate human lands or fight the demon Queen's rivals.
Cue a situation where the protagonist is in constant communication with a scantily clad demoness ordering her around, the heroine has to hide her connection with the demoness from the church, she might find herself in positions where the demon Queen's other more monstrous minions are around to give her help and she has to pretend to drive them off if other humans are watching, or the heroine has to try curbing the monster's various chaotic evil tendencies to get things done.
Bonus points if the demon Queen is actually one of the weakest and poorest lieutenants and is hoping getting an Isekai heroine on her side will give her the edge to defeat all her rivals. The standard kleptomaniac hero trope is partially justified by the demon Queen herself wanting lots of cash to fund her operations and is tired of living in some crappy starting area dungeon located in a tree or sewer or located behind a waterfall or something. She might even be the "first boss" of the game where starting adventurers can reliably break into her dungeon and steal her stuff
The only reason she's still around is because either she specializes in resurrection magic to resurrect herself and her minions every few days (as opposed to the more powerful lords who need years or centuries to regenerate), or the humans consider her such a low threat that they avoid permanently destroying her to keep a more dangerous demon from taking her place.