Shall I use JSONB for integers based array? I need to store a list of ids in array per each row.
I thought to use JSONB, then store it as : {ids: [1, 2, 3, 4]}.
Then, I found Array type, that I can use to store ids directly into.
The question is, what is the recommended data type for my case?
Unless you have a very good reason to do otherwise, the recommended storage is always normalised.

Store the integers in a separate table of (other_row_id, the_integer) and join on them.

If you must use arrays, use PostgreSQL's native arrays ARRAY[1,2,3].

Storing them as jsonb is a spectacularly inefficient and clumsy way to do it with essentially no advantages.