butterandjam
About three months before she died, my favourite aunt summoned me "for a visit"; it turned out, it was to say a last goodbye. We knew her cancer was terminal. She had decided her "end of life" was to be strictly private, shared only with her children.
She asked me to honour this last request and promise I would not visit her again, ever, in the wretched final stages of a cancer our family knows all too well. She asked all her closest friends the same thing. I promised, and kept it. We all did.
It sounds to me as if Ralph Fiennes may have made a similar last request for absolute privacy and discretion (which extends to his wife, and the nursing home) .
In which case, like your aunt, would he not have announced this to his family and friends?
However as the police have confirmed Ranulph is in an appropriate facility and there are no concerns about his care, safeguarding or otherwise- it appears his wife is making decisions that support his well being.
Is this his own home with his wife and a carer?