We are so sorry to hear of your very sad loss and understand how upsetting this has been for you and your family.
We are not sure how long a parcel would normally take to arrive from Canada, and especially during the current situation with the pandemic adding to the reduced workforce and increase in the parcel and postal traffic generally. I would suggest having a look at the Revenue Irish Tax and Customs website regarding How to locate goods
arriving in Ireland as a possible starting point for all post and parcels arriving in the country. They also have a more general contacts page
which you may find helpful too.
In addition, there is a page from An Post regarding prohibited and restricted items
allowed to be sent by post, human ashes are on this restricted list so it may also work the same way for packages coming into the country.
Before you decide to send any further portions, I would suggest also having a look at the Revenue page on the Importation of Urns
which may also lead to the necessary correct procedures in this case.
Once again, we are sorry for the loss and hope that you and your daughter are able to find the very important ashes and jewellery.