Yep, after moving from Germany to the UK I was pretty surprised that in the UK you’re not supposed to get this kind of information from your ISP.
In Germany you can get your own DSL/cable/fibre modem and your ISP has to give you the necessary information to get these devices into their network.
Not illegal, but the ISPs are seemingly under no obligation to give you those details. In Germany, there’s the “freedom of routers” embedded in the telco law. So they HAVE to give you everything you need to get your custom router online via their wire/fibre.
Bridge mode is just using the ISPs router and bridge that into your router. It’s not the same - you still need the ISP’s access device instead of just yours.