Here are the images released by Pos Malaysia: https://www.facebook.com/plugins/post.php?href=https%3A%2F%2Fwww.facebook.com%2FPosMalaysiaBerhad%2Fposts%2F4365515440222434&show_text=true&width=500
There will be a total of 400,000 pieces of stamp for each design.
The list of products are: https://myfdc.me/2021/10/08/next-date-of-sale-11-october-2021-world-post-day-2021/
The World Post Day 2021 Mel Rakyat will also be a good match for tomorrow. The space might be an issue as the images of the stamp looks rather big. The 2021 Mel Rakyat should have arrrived in your area. They are distributed by the Mail Delivery Centres and not through the usual Post Offices as of the time of writing. You might ask your friendly neighbourhood postman (not Spiderman) if he has any.