わかってきた

have come to understand

→ 分かる
phrase Uncommon #14,066
have come to understand Indicates that something has gradually become understood or clear over time. The きた shows a change developing up to the present.
JA: 最近、この仕事のやり方がわかってきた。
EN: Recently, I’ve started to understand how to do this job.

彼のねらい何だかわかってきた

I'm beginning to understand what he's up to.

私は彼の意図を誤解していたということがだんだんわかってきた

I gradually came to realize that I had misunderstood his intentions.

どちらを購入する決定難しいことだとわかってきた

I've come to realize that deciding which one to buy is difficult.

彼が手伝ってくれないということがだんだん私たちにわかってきた

We gradually came to realize that he wasn't going to help us.

彼が私を好きでないことが私にはわかってきた

I've come to realize that he doesn't like me.

事の真相少しずつわかってきた

The truth of the matter is gradually coming to light.