Yes, the full solo routes aren't in the game yet. But they are currently being worked on.
The only finished route is the full-harem route. Basically say yes to every girl.
Well that's not supposed to happen. Did you really from the start say yes to every girl? If so and you didn't get the full harem route then there is a bug. You could tell Seacth (dev) directly via Discord.
Maybe try again from the start with the latest version of the game (12.5) and then see what happens. You could kinda speed through it and if everything works out, go back and experience the story in full afterwards.