It's important to keep in mind that while the idea of a vaginal area being more sensitive than others is generally supported in research, the details regarding it are a bit all over the place: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8498956/
It can vary greatly between women, and while the majority might self-report that a more sensitive area is in the anterior wall (towards the front of the body), a number report more sensitive areas in the wall near the back of the body instead.
Rather than trying to identify a "one size fits all" concept of the G-spot, it's arguably better to recognize that there's a high likelihood of certain areas being more sensitive to stimulation but consider the exact location and size of those areas to vary person to person.
As is generally the case, it's best to communicate with a partner and to experiment to find what's individually ideal rather than having an expectation of a 'norm.'