There is no need to read too much into Kim Yo-jong's inspection tours

Some people are questioning whether it makes sense for Kim Yo-jong to be conducting inspections instead of the Supreme Leader, wondering if something is actually happening. However, that is a question you can only ask in a "typical" dictatorship.
In an abnormal country like North Korea, which is essentially no different from a massive mafia organization, common sense simply does not apply.
If someone has died, it will be reported eventually. Until then, you just have to assume they are still alive.