Trump was impeached over a phone call to the President of Ukraine.
This call from Biden to the then-President of Afghanistan is bad. It paints both men in a bad light. It was a difficult and perhaps impossible situation for both of them, but each of them made their own bed. Biden asked Ghani to lie for him. The rationale probably was, if you admit things are bad, they get worse. If you lie and say things are good, perhaps that changes people's attitudes and actions to the point that things actually become good.
Anyhow, to the point, this type of lie is not impeachable. He didn't lie under oath, or to a judge, or to Congress. He didn't abuse his power, nor did he act beyond his power.

---