Prettier 3.8.1
Playground link

--parser babel

Input:
All are prettier tests at

!(x || y);
!(/* foo */ x || y);
!(x || y /* foo */);

Output:

!(x || y);
!(/* foo */ (x || y));
!((x || y) /* foo */);

Expected output:

!(x || y);
!(/* foo */ x || y);
!(x || y /* foo */);

Note: Same as input

Why?

The added parentheses are unnecessary - !(x || y) already groups the expression clearly.

Also, this is inconsistent: multi-line chains with comments don't get extra parentheses:

!(
  x || // foo
  y // bar
);

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