If Garam return to Le Sserafim, I'm afraid she will still get silent treatment from Kfans.
HYBE/Soumu need to stop with their silent treatment first before they even think to let her back on stage.
They maybe couldn't clear her completely, but they need to at least give some statements that could help her reputation even for a bit with undeniable proof.
And they need to do it right this time.