I have mixed opinions on this.
At my high school, the policy was something like "phones are not to be seen", ie: you can bring your phone, but woe betide ye if it's spotted by a member of staff. In practice, there was plenty of phone use during the school day, including during lessons ("look, I've got a new 'smart calculator'"etc), but generally most people respected the rules most of the time. I don't know what's changed as a result of coronavirus. At my middle school (three tier system where I live, covers y6-8), the policy was "hand your phone in to reception at the start of the day, collect at the end", which again had a reasonable degree of respect (though of course there was a medium-sized minority who kept their phone during the day). Both reasonable policies in my opinion, based on the age ranges and school locations (the middle school is on the edge of a village, with a large catchment area up to around 10 miles I think; the high school is in a town, but with a larger catchment area. For both a significant number of pupils live in small villages, very much "rural countryside" (but in no way remote or isolated, such as mid-Wales for example).)
Phones weren't really a thing that children had whilst I be was at first school, I have no idea what the policy there was (probably non-existent!).
I think I acquired a "dumb" phone from an elderly relative in around 2013. I never took this to school, there was no need. I got a smartphone in June 2015, right at the end of year 8. Again, no need to take this to middle school. At high school, I very occasionally took my phone, always for a specific reason, but again there was no need in normal circumstances. Despite me doing several after school activities which meant I needed to get the public bus back home, rather than the contract bus. Punctuality was... variable! And due to the timings of activities, I would have to get the last bus of the day, which could be up to half an hour late. But no need for a phone, because my parents knew what days I'd be home late, and that the bus could be late. Plus most of the days my older brother would also be getting the same bus. And I should point out that my mum was very strict and controlling about what we could and couldn't do.
In the sixth form (part of the high school), I did bring my phone, but I could have fairly easily coped without. The same rules applied to sixth formers, apart from in sixth form only areas.
So in my opinion, "thou shalt not bring thine phone to school lest it be confiscated (and memory wiped?!)" is much too draconian (and unnecessary), but "we don't care if you're using your phone during lessons" is too lax. (Unless, like a small number of schools, pupils are expected to use their phone for things like research during lessons, rather than going to a computer room.)