Well, I overlooked that.
The solution is to address LWG2453 <https://wg21.link/LWG2453> incidentally.
Although <initializer_list> is freestanding, all entities in <iterator>
except stream iterators are freestanding after P1642R10
<https://wg21.link/P1642R10>, so there is no problem to solve it.
I'd like someone to help me write a proposal because I'm not very good at
writing these kinds of standard documents and my English is not very good.
I will be very grateful.

On Tue, Aug 30, 2022 at 10:12 PM Giuseppe D'Angelo via Std-Proposals <
std-proposals_at_[hidden]> wrote:

> Hi,
>
> On 30/08/2022 15:43, hamburger blacktea via Std-Proposals wrote:
> >
> >
> > I tried submitting it as a standard library issue, but the LWG chair
> > said it needed a proposal. Can someone help?
>
>
> Please see https://isocpp.org/std/submit-a-proposal
>
> You basically have to produce a document and submit it.
>
> Please read some existing proposal to see what's the expected design of
> such a document:
>
> > https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/
>
>
> As a minimum you have to argue as of why do you think that this removal
> makes sense. Just saying, we're 11 years into the making, and so that
> removal will break code:
>
> void f(std::initializer_list<int> i) {
> begin(i); // right now works; doesn't after your proposal?
> }
>
> So you'd have to justify why this code "deserves to be broken", which is
> already a pretty high bar.
>
>
> HTH,
> --
> Giuseppe D'Angelo | giuseppe.dangelo_at_[hidden] | Senior Software Engineer
> KDAB (France) S.A.S., a KDAB Group company
> Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
> KDAB - The Qt, C++ and OpenGL Experts
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>