It's generally very, very rare to get saves. And honestly probably even rarer in this game, given the multiple things that can happen that might lock out/change other content, the NTR on/off toggle at the start, and the fact that saves almost always need to be restarted every update.
Your best bet if you just want Jezera/Alexia stuff as fast as possible is to make a new save, skip intro, progress in the game until Alexia opens up the job system, then if need be use console commands to raise Jezera's influence with her and Alexia's corruption. This would honestly be pretty fast, especially utilizing console. You definitely need to finish the objective of going to the nearby town, then taking Raeve Keep, but you might also need Orcaid events. The only one of those that takes any time at all would be Orcaid; so as long as you know where to go (There are guides if you don't remember), the early portions of the game can be breezed through really, really fast if you're only interested in some scenes.
As for going back in your current saves, that depends on if your saves are from this version. If they are, just go back from before you got enough Andras influence to proc that route (Though for all I know the twins corrupting Alexia routes aren't even mutually exclusive; I don't play them.) If you're using saves from a previous version, that's...probably not going to go well. You could probably, if you rooted around for the exact flags in the console-enabled event viewer (Or more likely, you'd have to check the code itself, which was not meant for mortal eyes, but is possible), disable certain flags and enable other flags too, but that's...well beyond my pay grade to give advice for anymore.
The way village/abbey/mine-whatever-type-of-fancy-tile-that's-not-grass-or-forest-etc tiles work is you go to them, you get a random event, then that tile is done, no more content there. (At least as of now, not sure it'll ever change. There's at least one - a town where you can negotiate for...benefits of the threesome variety - that at least in flavor text says you're welcome back for more, but that may just be flavor text, or probably even if not, would then lead to a random event or something.)
If you're going to village tiles you've never been on before on that save and not getting an event, I would think that's a bug. But I'd check carefully to make sure you actually didn't actually step on that tile previously and forget.
