DD (14) is at a school that "officially" says phones must be off and in bags or they will be confiscated.
In reality, homework is all on an App, there's a class WhatsApp, they seem to use them to play Kahoot in tutor group and there are many occasions where they are allowed to use them to take pictures of the board or use timers etc in PE, science and so on.
DD got an old iPhone before starting Y7. She can't download apps without my giving permission online each time, and I have the right to check it. Having seen how things have changed over the years, it is hugely easier to keep an eye on what they are up to at 11/12 than at 13/14.
I was pleasantly surprised how nice they all were on the class WhatsApp. Never been any issues in 3 years.
I'm now pretty liberal with what DD can have - she's not really interested in FB, has IG but her peer group seem v uninterested in 'likes' or followers or anything like that. Also has TikTok, Snapchat etc. The worst I seem to deal with is constantly advising her that no, hair doesn't grow faster with special £50 shampoo etc. She is an marketeer's dream... so I am glad she's still young enough that I can show her how to evaluate information sources and not believe everything you see!
Fine to start with a non-smart phone, but I'd just assume you'll be going shopping for one at Autumn half-term.