You may well find something that fits your situation with a little searching.
FWIW their box isn't bad once you put it in bridge mode. I have 10gig on my lan and 3gig to the edge and the connection is impressively stable at 3gig. I get 1 ping sometimes when playing Fortnite -- I'm on Vancouver Island. Comical if not inaccurate.
My only real issue with having their box is it sucks maybe 30watts ... Removing it would give me an extra 20 or so minutes on my UPS.
US? Not Verizon/Frontier or the shared fiber networks. I'll need their ONT, if that's what you mean but it's always my router.
AT&T is another matter. I avoid them whenever possible.
Or are you talking about something like a Dream Machine Pro Max where the you'd plug in the fiber into the SFP module?