Patch 1.5.15.0 is on Dune: Awakening's Public Test Client, not the live servers, and Funcom hasn't given it a date. It's a big one: about 120 fixes plus guild renaming, native DualSense support on Steam and a long list of building and story fixes.
What did reach everyone is hotfix 1.5.3.6 on 6 October, which lets Steam players run single-player without BattlEye, followed by a small Arrakeen fix in 1.5.3.7 on 9 October. 1.5.15 and 1.5.3.6 are covered below, plus every 1.5 hotfix so far. From Funcom's patch notes, checked 13 October.
The rest is fixes: about a dozen for combat, fifteen each for the world and the story, and dozens more for the UI and graphics. Funcom's full notes list every line.
Test progress stays on the test servers across builds. Funcom has never said it carries over to your live character, so treat it as a sandbox.
