It was funny to see the person posting it stress that it was not a Buttonwood and that person was so correct.
That was me. Alas, I lost mine last winter.
Just as an alert, I'd just that year put it into a small (relative to the size of the tree) pot like yours. It leafed out fine, but then declined. It didn't wake up this spring.
Just an alert that they may not like such tight confinement. There is a very, very small amount of records for this species as a bonsai. If I could find another, I'd keep it in a larger pot -- it did fine in one for 5 years before I moved it last year. BUMMER.
You don't say where you live, but if it gets cold there, you may want to really
protect the roots in this pot.