The Arsenal goalkeeper is on-loan at the FC Hollywood to the end of the season.
And with his Gunners deal to expire in June, Wrexham are working on convincing Okonkwo to stay long-term.
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Wrexham boss Phil Parkinson is eager to hold onto the keeper, having been impressed by the youngster.
For the weekend win against Mansfield Town, Okonkwo kept a clean sheet for the 14th time this season.