Except that you appear to be currently missing an SFP in the Adva for that to work. Which IMHO is little more than a wildly over the top media converter anyway.
In terms of what you need in the Ubiquiti line of things an EdgeRouter 6P is what you want for a 1Gbps connection. While the cheaper EdgerouterX SFP does take SFP's it can't route 1Gbps symmetrically. Well it's work you just won't be able to take full advantage of the connection.
If they are not going to provide an SFP, for Access3 then you could do one of two things, get an RJ45 SFP and use an ordinary patch lead or use a SFP+ direct attach cable to an SFP capable router (while they are technically for 10Gbps some testing (like on every 1Gbps SFP port I could lay my hands on, which is a lot) shows they just work at 1Gbps too.