This article prompted me to post. https://www.theguardian.com/lifeandstyle/2022/nov/19/adults-who-have-cuddly-toys-comfort-objects?CMP=ShareiOSAppp_Other
I still have mine 'mouse' it sometimes goes on top of my pillows or on the bookcase. It was handmade by my aunt over 30 years ago so has seen better days.
I wondered if it was odd to keep it out in my bedroom still, but now feel slightly reassured.