in joomla 3.x (but this is also true for joomla 4.x) we faced the problem of registering our loggers. there the namespace is rigidly tied to the kernel, that is, we cannot register our loggers at all. We had to make our layer MyLog extends Log and override the addLogEntry method

In code: https://github.com/joomla/joomla-cms/blob/4.0-dev/libraries/src/Log/Log.php#L355

How can this be solved?
We decided in our own way, but I'll write about what can be done here.

if(class_exists($this->configurations[$signature]['logger']))
{
    $class = $this->configurations[$signature]['logger'];
}
else
{
    $class = __NAMESPACE__ . '\\Logger\\' . ucfirst($this->configurations[$signature]['logger']) . 'Logger';

    if (!class_exists($class))
    {
         throw new \RuntimeException('Unable to create a Logger instance: ' . $class);
    }
}

A similar problem applies to registering your Storage classes for Cache: https://github.com/joomla/joomla-cms/blob/4.0-dev/libraries/src/Cache/CacheStorage.php#L149