the hiring process clearly selects for "has worked with <insert specific set of technical tools> experience. Even a great candidate can't seem to be attractive

the hiring process clearly selects for "has worked with <insert specific set of technical tools> experience. Even a great candidate can't seem to be attractive to other folks in our hiring process if their past experience doesn't include <specific tool/framework> use. this is what i find most frustrating, and what makes getting a job as a generalist so hard. i have experience with a number of tools and languages, but never the right combination that is asked for. if i don't find hiring managers like you, i don't stand a chance. many candidates don't have a CV/resume or cover letter that leans into demonstrating the candidate can write code how does one demonstrate that? in my CV i list projects that i contributed to or created, languages and frameworks that i am familiar with, but to me that doesn't demonstrate that i can write code. or does it? are there applicants that don't list these things, or am i missing something?