Pip has been a flag bearer for Python packaging standards for some time now, so that alternatives can implement standards rather than copy behavior. So first a lock file standard had to be agreed upon which finally happened this year: https://peps.python.org/pep-0751/

Now it's a matter of a maintainer, who are currently all volunteers donating their spare time, to fully implement support. Progress is happening but it is a little slow because of this.