MacBook Pro A2141 looks up to several slightly-different MacBook Pro 16-in 2019. These have as many as four Thunderbolt-3 ports.
In general, Macs do not support multiple displays on one USB-C cable at all. In general, a Thunderbolt cable to a genuine ThunderBolt dock is required to support up to TWO displays on one Thunderbolt cable.
The HP G2 disk is a USB-C dock, and would not support two displays on a Mac in most circumstances. Windows has different standards. On a Mac, a ThunderBolt Dock would be required.
HP suggests this may be a DisplayLink device. if that is correct, with added DisplayLink software, a DisplayLink device can sometime support more displays, with strongly reduced responsiveness. Resolutions must be modest to avoid exceeding the bandwidth of a USB-C connection. DisplayLink displays are NOT suitable for Full-motion Video.