Proposed resolution:

This wording is relative to N5008.

1. Modify Table 27 [tab:headers.cpp.fs] as indicated:

   Table 27: C++ headers for freestanding implementations [tab:headers.cpp.fs]

   	Subclause	Header
   […]
   [bit]	Bit manipulation	<bit>
   [stdbit.h.syn]	C-compatible bit manipulation	<stdbit.h>
   [array]	Class template `array`	<array>
   […]

2. Modify [stdbit.h.syn], header <stdbit.h> synopsis, as indicated:

   // all freestanding
   #define __STDC_VERSION_STDBIT_H__ 202311L
   
   #define __STDC_ENDIAN_BIG__    see below
   #define __STDC_ENDIAN_LITTLE__ see below
   #define __STDC_ENDIAN_NATIVE__ see below
   
   […]
   

Per C23/WG14 N3220 4 p7, <stdbit.h> is freestanding in C23, but C++ hasn't required it for a freestanding implementation. LWG 4049 is related but doesn't cover this, because there's no <cstdbit> standard header.