Is COPY tablename FROM stdin with csv in Postgres at risk of SQL injection?

I'm using python, psycopg2

When the following code is executed, it reads the contents of the file once and writes it from standard input to DB.
If there is a description in the file that allows SQL injection, is it possible for the OS to interpret it and cause SQL injection?

conn_config=dict(port="532", dbname="test", password="test")
with psycopg2.connection(**conn_config) as conn:
    with conn.cursor() as cur:
        with open("test.csv") asf:
            cur.copy_expert(sql="COPY test FROM STDIN", file=f)

I read the official document for psycopg2, postgres, but I couldn't find any related statements.
When I tried code execution, I didn't find any behavior like SQL injection, but is there actually a risk of SQL injection?