Wow! You are anything but a newbie. That is so strange about your status.
I bought a house with my husband shortly after he immigrated from the US (through my sponsorship). He had all sorts of tax documents from the US but the bank was like "nope!" and would only look at my stuff for the Canadian mortgage. Mind you, that was well over 10 years ago now.
I think you would find not much different today. A couple of years ago, I was looking to borrow in Canada. I had clear title property I was willing to mortgage. I thought it would be a cakewalk. So, banks (and a few credit unions) asked me about sources of income. I showed them my significant (to me) rental income from a property in Los Angeles. I was told "Sorry, U.S. money does not count." Then, I spoke of my regular income from legal writing. I was asked "So, are you a regular, full-time, employee?" I said that I was considered a freelancer, although all my work product was for a single "employer", who had been paying my monthly invoices for 26 years. The banks all said that, in that case, the income would not count. I ended up forgetting about a mortgage loan and liquidated some investments to raise capital.
I found it much easier going the other way. Moving to Los Angeles, U.S. banks had no issues in giving me a loan for a house, even though I had yet to establish any credit or tax history in the U.S.