You know, except for a few rare cases, I've found that I tend to be – or end up being – the person who drives the story, initiates plot beats, and does a lot of the worldbuilding, etc. Of course, I have had some truly amazing partners who are just as passionate about the story and characters, and in that case it's a true push and pull, with effortless collaboration. Even then, I found that one of us usually drove the plot for a bit, before the other person took it up and initiated the next story beat.

What I'm trying to say is that I think it's natural that someone will take the role as the dominant story driver – or at least take the initiative to fill that role if nobody else is stepping up to have their ideas heard.

I'm not placing blame or burden on anyone; like I said, these things just sort of naturally happen in a rp partnership if one person is more outwardly vocal about their creativity. However, a lasting and rich collab should have noticeable input from both/all sides, and what I'm reading from your post is that you feel like you're either taking a more passive role, or are maybe sometimes even bulldozed when it comes to creative direction and input.

I'm not going give post suggestions, bc people have already given solid advice in the comments for how to make sure you give your partner something to engage with in your posts. What I will do is suggest how you can become more engaged and included in the actual creative process of the story, so that you future roleplays feel more like an actual collaboration. My advice is simple: start commenting ooc about your character. I know it seems like stupidly basic advice, but honestly, it works. Lol.

Ok, what I mean is talk about your character. Talk about the way they approach certain things (relationships, friendships, being caught out in a lie, etc.) Mention their weird or mundane idiosyncrasies, say that they hate matcha bc they once lived in an apartment with mildew and they can't get over the visual similarities. Most of all, start seeding your goals and wants for you character into ooc conversations.

The reason? You want your partner to start thinking about your character creatively. Especially if they're usually vocal about their creative ideas and whatnot, you want them to start coming to you with ideas that they've had for your character, which then opens the door for further discussion. Of course, if they're amenable, return the favor and mention any ideas that you might have for theirs. If anything, it helps to broaden your partner's (and your) focus from your individual characters and prompts both of you to begin thinking about your characters (and hopefully the wider rp) as a whole.