For IRCC to exclude your child from your pr application, they will need to see documents which will clearly state that you have no access to the child in legal terms. It means you will have to show custody documents which states your ex has full custody to the child. The very fact that if they have your divorce docs stating you have access twice a month to the daughter, it also means they will want to see the meds and other docsI had recently submitted an application in the court that my exwife has not brought my daughter in the court during the last 3 years. There was an order passed by the court at the time of divorce that my exwife will have to bring my daughter twice a month for a 2hour meeting with me each time. My recent application states that my exwife is not doing it.
Can this be an evidence for IRCC? Is this a sufficient document for proof of custody?
It is upto you to convince your situation to them that you have no access to the child since your divorce. For this I guess you can submit the papers where you are seeking legal help to see your daughter. But my guess is that will not be sufficient. So you will have to make your ex-wife write to you that she is not willing to allow the child for meds or provide any document. And you will have to exclude your child from the option of future sponsorship. If this is ok with you, you should work on providing documents to convince ircc that you tried getting access to the child but were not able to.
Also if your country has any such terms that wife gets the custody provide that too.
Hope this helps.