For some reason, when I click ‘+’ to open a new tab in Safari, I no longer have the option to open a private browsing tab. Is there a setting or something else I’m missing?
It looks like you're right. I didn't have my phone to hand and only assumed that blocking private browsing would be an available restriction (it makes sense, at least: parents would want to be able to see their kids' browsing history), but it looks like there isn't actually an option for it.
That did it! I thought I had that on before I lost the Private tab option and don’t remember changing that setting (it’s buried pretty deep!) but it’s clearly linked