Ctrl+Space not working under Windows Terminal

[Christian Franke]

Lavrentiev, Anton (NIH/NLM/NCBI) [C] via Cygwin wrote:
>> I then see "C-@" echoed in the minibuffer, and the resulting *Help* buffer says
> WFIW, in the DEC VT terminals (from where most of ANSI controls stem from), Ctrl-Space used to
> generate a NUL character (ASCII '\0'), and so maybe it is seen as a fill character by the OP's
> terminal and, therefore, is ignored.

Cygwin also generates NUL:

$ od -t x1
1[Ctrl+Space]2[Ctrl+Space][Ctrl+Space]3[Return]
[Ctrl+D]
0000000 31 00 32 00 00 33 0a
...