Fi is Google's own MVNO that offers phones such as the Samsung Galaxy S21 Ultra and (naturally) the Pixel 5. Its latest phones are from Motorola, however. The 6.7-inch, Snapdragon 750G-powered and 5,000mAh One 5G Ace is now up to US$120 off its retail price through Google Fi. It is joined by the 2021 Moto G Power and Moto G Play on the network.
https://www.notebookcheck.net/Google-Fi-now-offers-the-Motorola-One-5G-Ace-on-its-network.522778.0.html