But I can't find a single piece of water cane on my entire Gleba world, I've gone thousands of meters and used the deconstruction tool to check if anything was water cane, but I got zilch, is this a bug or?

I've validated that water cane is still generating with OWS 0.7.1 and the recommended mod suite. Do you have any other mods installed?

Quite a few, but none that should be messing with Gleba much at all besides maybe Alien Biomes(?) and Gleba Reborn, and the other crops generate just fine so I don't know why one would generate fine while the other wouldn't, I also have Maraxis, Age of Production, Cerys, Metal and Stars, Space Age Galore (And Vanilla Galore by extension), Janus and OWS, as well as all their associated mods.

Looks like it's Alien Biomes somehow. Will be investigating further.

Yep, appears that Alien Biomes adjusts collision for tree prototypes (water cane and cuttlepop included) which is massively restricting or outright removing their possible placement locations, even in otherwise unmodified Space Age. I've left a report on this over on the Alien Biomes side, but if it doesn't get patched in a couple days I'll probably attempt some sort of countermeasure of my own.

Roger that, thank you so much for the assistance with that! I was super confused but I had a feeling one of those would be the culprit, my Gleba experience will be vastly improved now :D