That depends on what you mean. If you mean using a simple system (like a single photon) as a stand-in for Wigner's friend, that has already been done. That's what the OP was about. If you mean using a complex entity like an actual human or an AI that can pass a Turing test, I'll give long odds against.

The later... I ask because every time I read about some thought experiment, it turns out to be an impossible experiment.

In a recent story I asked in general and others told me that there were thought experiments that became proper experiments. But it seems that they were somewhat different, more like pre-experiments. When something gets stuck in the thought experiment category, it's more like a no-experiment.

I have no problem admitting that this kind of ellucubration is useful to anticipate problems. But extracting conclusions from an impossible setup? That's like asking what would happen if an irresistible force meets an immovable object.