Coax-to-Fiber Install with own UniFi router - Bridge Mode?

Our HOA convinced Comcast to upgrade from Coax to Fiber in our community over a year ago and I finally have an install date (Sunday morning) scheduled for my property.

I'm an IT professional who 100% manages my own UniFi network and my UCG Max router/firewall is currently connecting directly via my own cable modem (i.e. "bridge mode").

How can I make sure the scheduled installer is prepared for my setup? I'm hearing Xfinity can't (doesn't?) provide an "ONT only" option and I'll probably be given an "all-in-one" fiber gateway that will need to be configured for this, disabling any built-in networking/wifi, etc.? I also hear some of the models (XER10?) don't even currently support bridge mode? I also want to make sure my fiber install is able to support the 2.5GbE WAN throughput my gateway is capable of.