it is 100% capable. A friend bought this one : https://www.aliexpress.com/item/1005004302428997.html
which is cheaper than yours on Amazon.
And he provided some test on openwrt here : https://lafibre.info/remplacer-livebox/remplacement-de-la-livebox-par-un-routeur-openwrt-18-dhcp-v4v6-tv/msg957494/#msg957494
+2Gbps with SQM on a 2Gbps fiber line.