Does cross platform cloud saving exist?

Following situation: I've been playing the OG for about 40 hours on my PC through steam and the offered cloud save. Since I will be away from home for a while due to uni (where I can't take my PC with me) I wanted to continue playing on my save-file through the mobile app.

Now, I have my square enix account both connected to steam and google, and it also shows the right save existing when I check through the website. But the mobile version of the game only lets me log in/connect to cloud saving through my google account (instead of also offering square enix which would work the best for me). When I do that, I'm unable to download any saves from the cloud, as if the email wasn't connected. My only option is to start a new game.

So does PC/mobile cross saving even exist and if yes, how do I manage to make it work? Or do I have to manually transfer my save somehow to continue playing from where I left off of?

Edit: For anyone who wants to do the same thing, I ended up taking the save file from steam and replacing it with the one I had on phone (on which I only played until the first save point in the reactor). This works without a problem, as the both files should have the same name. For the steam file, you can find it under Documents < Square Enix < Final Fantasy VII Steam < user_(numberstring) < save00.ff7; The phone file is decently easy to find by just searching for "square enix" or "ff7" while you have it open and connected on PC as it should have the exact same name.

I'm unsure how well this would work in reverse, though, mostly because of the mobile versions added features.