How can I get “Order Items Post Meta”?

Hello,

I would like to get the data from “Order Items Post Meta” but I don’t know any code to get that but I can get the data from “Order Post Meta”. So, “Order Items Post Meta” is the sub-meta of “Order Post Meta”, right? and how I can get that?

Here is “Order Post Meta” that I can get.
https://drive.google.com/file/d/15LIw7Ts1f-t199IX6iaOBCg4PIEh600b/view?usp=sharing

Here is “Order Items Post Meta” that I would like to get
https://drive.google.com/file/d/1x4Fao5QzO-nivhy-MJeuyxjUECGIV7nU/view?usp=sharing

Thank you.