It appears that you might be referring to "Withholding of Removal," (not withdrawal of removal). More information is needed in order to determine exactly what is going on with his case. You should consult with the lawyer as soon as possible.
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It's simple. You ask your lawyer whether or not he/she filed the case and ask for a copy of the submission. And if he/she refuses to provide it to you, that's definitely a red flag. Good luck.
The statement above does not create an attorney-client relationship. It is intended as general information only and it is not a substitute for legal advice. You should consult with a licensed attorney to discuss the specific facts and circumstances of your case.