Solanke scored in Saturday's 2-2 draw with Manchester United.
Iraola said: "We have to respect Gareth (Southgate's) job because it is a tough job and there are many quality players.
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"Dominic cannot do any more, it is not just about the goals but the performances that he gives us.
"For me, it is a luxury to have him as a number nine. It is not my decision and we all have our jobs. I guarantee you I would not change him. Whoever Gareth chooses, they are all top players."