Thanks @Marina B I hope the weather starts to perk up soon! Italy is on lockdown so I can't explore parks etc for other flocks but that one never seems to come down off the roof so I am not sure I would be able to release her to them.
Well, after 3 days with the window open (screen down, so she couldn’t escape) today was the day for the soft release! Cher flew away and stood watching me from the roof next door, and within about an hour she found the flock! So she’s now happily hanging out with her other pigeon friends! What a lovely end to the 2 months of time we have had her!