Judging from the air bubble holes it looks like Autoclaved Aerated Concrete (AAC). Local AAC brands don't have this long format, unless customised or use their lintel (with embedded bars thus more expensive). Standard block length 600mm. Thickness varies 50-300mm. If you wanna use thinnest block to stick on wall as decoration you lose 50mm wall thickness.
Local brands such as Starken, Alamcon, Greencon
Overseas brand such as Hebel

lol. bcos it's meant for wall than finishing.

This could be customised product or rare stone finish. Hard to get exact finish. By the way, it looks full body and not printed...see the edge also have black dots.
Your alternative options:-
1. AAC - more white and smaller bubbles. May not get same look.
2. Sukuza - didn't have such finish, but other texture
3. Tiles with print of similar finish (see attachment)
4. Vinyl sheet with print of similar finish



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