With PEP 757 - one can be replaced by PyLongWriter API.

I was able to find just one project on the GH, using this function. On another hand, this function was removed and then restored in #112026. So, maybe we should first deprecate this function.

Linked PRs

• gh-128863: deprecate _PyLong_FromDigits() function #127939
• gh-127937: convert decimal module to use import API for ints (PEP 757) #127925