Steam will receive the 1.0 version of the game once everything is ready (probably around the middle of 2027). Until then, what will be available there is only a stable demo with all the content we have available so far (including what until NOW was only available on Patreon).
Unstable versions, test builds, and betas are still available only on Patreon, with everything becoming 100% available in the final 1.0 release.