Bottleneck is mainly China.
It isn’t just affecting boards and wheels - footwear, clothing and a ton of other products are all behind on production due to the factories in China being closed for months.
All of the stuff dropping into stores right now would be Autumn '20. Where I’ve worked in the past; that stuff begins production at the end of March and takes until mid-June to finish.
That said, even if you didn’t buy wood pressed in China - the factory closures were almost global.
Production and manufacturing industry is behind.
I heard Nike are skipping kids trainers for Spring 21 to allow their factories to catch up.
Some other brands are skipping winter '20 pulling the carry over styles back into Autumn and the new styles into Spring '21.