They are still landing and getting refuelled at Toronto Pearson (YYZ)
Saw a huge Boeing a couple days ago. I was coming in from Cuba, strangely enough.
What you saw was the known case of a Volga-Dneper Antonov-124, not a Boeing, which has been stranded at Pearson since Feb.27th 2022. It arrived with cargo from China with stops in Khabarovsk Novy in Russia and Anchorage. It was scheduled to depart again but in the meantime Transport Canada closed the Canadian airspace to Russian operators and the airplane has been stuck there since then.
Russian registered aircraft, large and small, are stuck all over the globe but they're going nowhere at the time. They are being serviced though to prevent them from decay.
There's an A320 sitting at Amsterdam Schiphol that I know of.
There are three Antonov AN-124 Leipzig, a Bombardier BD-100-1A10 Challenger 300 and a Boeing 737 in Cologne and a Boeing 747 in Frankfurt-Hahn. Another four aircraft are in Baden-Baden: a Cessna 750 Citation X, two Embraer ERJ-135BJ Legacy 600 and a Bombardier BD-700-1A10 Global Express XRS which are all private aircraft of Russian oligrach which cannot go anywhere, same as their seagoing yachts that have been chained in ports if they were not quick enough to leave.
12 aircraft are stuck in Switzerland, one of them an Aeroflot airliner, the remainder being business jets.
Added info: about 400 western made passenger and freight airplanes are stuck in Russia of which about 2/5 is not airworthy anymore due to lack of maintenance and parts. The remaining 3/5 are becoming critical and probably would not be alowed anymore in western airspace due to inadequate airworthiness documentation.
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* Origin: AVIATION ECHO HQ (2:292/854)