I see. Did you receive any acknowledgment when you submitted it thru webform?
Like this one:
Un message en français suivra…
Good day,
Thank you for contacting Immigration, Refugees and Citizenship Canada (IRCC).
We acknowledge receipt of the documents and wish to inform you that they have been added to the file. Please note, for technical reasons, they may not be visible in your
online account. Rest assured that your supporting documents are indeed added and available for officer review.
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I really hope and pray that you will have everything sorted out and that your children will get their visas soon! I feel your extreme effort on this.