Debian 10 reached EOL LTS yesterday, on 2024-06-30.
There no longer seem to be compelling reasons to maintain support for CMake 3.13.
The suggested minimum required version, CMake 3.16, is shipped with Ubuntu 20.04 LTS, which is supported until April 2025.
Debian 11 ships with CMake 3.18 (3.25 in backports). In other major distros and package managers, CMake versions are not older.