Agree with others. If all you need is to connect the monitors, I think it's easy / cheaper to just get 2 USB-C to DisplayPort cables (can get them easily on Newegg or Amazon), and just plug them into the 2 TB3 ports on one side of your 16" MBP.
Now, if you need a dock for other purposes (have other peripherals / external drives, etc.) or really want a "1 cable solution" (ie. maybe if you'll be disconnecting/reconnecting the MBP to this desk and monitors frequently so only having to disconnect/reconnect 1 cable instead of 2 every time might be worth it in itself). If that's the case, I would still recommend getting a dock that has max 1 DisplayPort out for monitors (vs 2), and is primarily a Thunderbolt/USB-C hub. You could then connect one directly to DisplayPort and another with a USB-C to DisplayPort cable (only need 1 this time).
But unless you *need* a dock, I personally don't think the money it'll cost to get a good hub is worth it, especially when you're optimizing for a 6yr old MBP.