You should really consider getting a proper router like Unifi or the like.
It's a one time cost and it will save you from these issues no matter what ISP supplied crap you end up getting.
Just plug whatever ISP router directly into your own, more capable, router and your home network will look identical, no matter where you move to or how many times you change ISP.
That said, running Pi-hole on a Raspberry pi is a treat!