We would just say "How have you been lately?" for 你最近過得怎麼樣？, indicating you haven't seen that person in a while.

How have you been doing? <-- 比较常用的。 How is life treating you? <-- 一般熟人/朋友用的。 因为有点逗的含义。

你 最近 过得 怎么样？ = How are you recently?