I pondered not reporting this since it's so small, so please feel free to ignore
.
When launching the Simulator (only after a fresh install or update !), the Sampler window appears underneath the macOS menubar:
... and then can't be moved (or at least, I wasn't able to find any other drag handles). I'm able to resolve it by using the Window > Center option with the Sampler window active. Of course, then it stays for any following launch (until an SDK/Simulator update).
Platform: macOS 26.3.1
SDK version: (recent versions at least, but issue still present as of 3.0.5)