Ryanair offers a refund policy to the eligible candidates only under certain terms and conditions. Which includes If the flight is cancelled by  Ryanair under ryanair refund policy , then the passengers are eligible for refund,

• If there is a delay exceeding 5 hours in the flight takeoff schedule

• If cancellation is done due to the death of the immediate family member( If they are travelling with you or not that doesn’t matter) , In that case you can connect  to inform them. As far as it is a minimum of 28 days prior to your travel date, You are entitled to a complete reimbursement for your cancelled flight. 

• If the cancellation is done due to the Severe health condition or demise because of travel.