We do all have powers of arrest and other powers to protect ourselves and others.We all have the power of arrest.
https://www.claims.co.uk/knowledge-base/police/citizens-arrest#:~:text=The law states:,are committing an indictable offence.
It is so complicated though many forces do not want the PCSO's to exercise what is a right of all of us.
I think the PCSO’s are encouraged not to exercise those powers if possible due to public perception.
They’re damned if they do and damned if they don’t.
For what it’s worth, I think they do a good job but the general public doesn’t really understand their role. Which the police have to take some blame for. Their role should be clearer.