It might look like the trunk might be lacking taper. Just keep in mind this is a Ficus. They tend to thicken up very quickly. If the roots at the top of this rock infuse the tunk will thicken up around the base. This tree is far from being a fully developed bonsai. It still has a long way to go.

I am confident that the taper wil not be a issue for long.

Thank you for your input like always its much appreciated. 🙏🏼