Not yet, but we're finalizing the application and will be submitting soon.Did you submit a visa extension request for your parent?
As per the website, your parent will assume implied status until the decision is made for the visa extension request. I am sure by then they should have got their passports back
We were going through a few ups and downs past few days as we realized we needed to provide latest stamps on passport to request extension after the passport had already been sent out. Although it was still at the Canada Post outlet and not yet picked up for delivery, they refused to let us have it back per CP policy. We also learnt from cic guidelines that we would not be granted implied status if the application is incomplete - which could very well be the case for us as we wouldn't be able to provide latest stamps on passport. We got so stressed over the fact we might be out of status in Canada and it would have a negative impact on landing that we posted a new thread in this forum asking for advice, after frantically researching everywhere for info without success.
Fortunately, everything turned out well at the end. We call cic and was advised the same thing as what was kindly suggested to us in our post, i.e. apply for extension anyways with LOE, indicating we'll send latest stamps on passport later via webform once we get it back from cic. What's even better is that we got to speak to Senior Solutions team from Canada Post, who was kind and understanding enough to make an exception for us to get back our shipment. We quickly made copies of all pages in passport for visa extension and resent the passport to cic. Thought we would share our experience as it might be helpful for those who happen to be in the same situation like us