When using clang-query, the header is considered in isolation and the following errors are reported:

/workspaces/mongo/src/mongo/db/exec/sbe/vm/vm_memory.h:41:24: error: unknown type name 'uint8_t'
   41 | T readFromMemory(const uint8_t* ptr) noexcept {
      |                        ^
/workspaces/mongo/src/mongo/db/exec/sbe/vm/vm_memory.h:42:20: error: no template named 'IsEndian'
   42 |     static_assert(!IsEndian<T>::value);
      |                    ^
/workspaces/mongo/src/mongo/db/exec/sbe/vm/vm_memory.h:53:1: error: unknown type name 'size_t'
   53 | size_t writeToMemory(void* ptr, const T& val) noexcept {
      | ^
/workspaces/mongo/src/mongo/db/exec/sbe/vm/vm_memory.h:54:20: error: no template named 'IsEndian'
   54 |     static_assert(!IsEndian<T>::value);
      |                    ^

This can be fixed by adding the missing headers.

In server code, the header is always included after others, so it's just coincidence this is not a compilation error.