Did you add any soil or mulch?

I do not have any cacti in ground, but it looks quite deep in the soil.

It’s top-heavy. If you can, cut off most of the right side of the plant. These can be used to start new plants. Then you can stake/replant the original plant so that it grows correctly.

I also wonder if it is leaning away from that tree? Hard to tell how close they are, but plants like to have space - and sometimes it is quite a bit of distance...Tree could be creating too much shade for it.