The Xiaomi Redmi 9 Prime was officially released on August 4, 2020
The smartphone is equipped with sensors such as a fingerprint sensor (rear-mounted), accelerometer, proximity, and compass. The smartphone features an Infrared port, USB 2.0, Type-C 1.0 reversible connector, USB On-The-Go, and Bluetooth 5.0.
This most probably does not depend on your phone. Even in the same location, many things can affect wifi speeds. What might help would be having less internet connection requiring apps running in the background