I disagree with your statement, C++23 added std::ranges::contains_subrange and std::string::contains at the same time, and they do not conflict.
From: Std-Proposals <std-proposals-bounces@lists.isocpp.org> on behalf of Jason McKesson via Std-Proposals <std-proposals@lists.isocpp.org>
Sent: Friday, September 1, 2023 23:06
To: std-proposals@lists.isocpp.org <std-proposals@lists.isocpp.org>
Cc: Jason McKesson <jmckesson@gmail.com>
Subject: Re: [std-proposals] Iterators for basic_string and basic_string_view find functions
 
On Fri, Sep 1, 2023 at 10:04 AM Yexuan Xiao <bizwen@outlook.com> wrote:
>
> std::string requires work with string literals, therefore the member function `size_type find(const CharT* s, size_type pos = 0) const;` is a commonly used version, while std::ranges::find cannot directly achieve the same functionality.

Then your feature suggestion should be restricted to exactly and
*only* those interfaces.
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