My dude, I moved out of Canada and started my studies this week. We are in 2021. I applied in October 2020 and was in Toronto back then. Look it up on a map and see where it is. The purpose is to help people here and not take your frustration out on them if you did not get an invite yet. I hope you do and can re-unite with your parents.
My intention is not that and definitely not spilling my frustration at you. If you find that then sorry, but just read what you wrote. You were studying abroad from 12 months that means, 12 months from now (2021 Sept), which I am sure would be 2020 Sept.
By the way, as you have asked if you are eligible or not, and my intention was to answer that, which definitely is not putting my frustration, my rational mind would never do that. And answer to that question is "you are eligible not as long as you are living abroad". You need to live in Canada at the time of your application (application to be a sponsor by you and a permanent resident by your parent/grandparent, both can be done together) and must live in Canada until the decision is made. If you read carefully my earlier reply, I even provided you one way which can make you eligible, that is by moving to Canada and start living here, before you apply and until the decision is made.
P.S: Before you take your frustration at me for not being eligible as of now (but you have a chance to be eligible by moving back to Canada not just by being "deemed resident"), I would highly suggest read what you wrote, what I replied and information that IRCC have posted by clicking the link that I have posted in my earlier reply.