The December 2019 Starliner flight was meant to be the final unmanned test, planned to dock with the ISS and then soft-land on the ground.

True if NASA or Boeing records show that the December 2019 Boeing Starliner Orbital Flight Test was an uncrewed test intended to be the last uncrewed flight before crewed flights, and was planned to dock with the ISS and then land on the ground under parachutes and airbags. Mostly true if all of this holds but one minor detail is off, such as the wording of 'final'. Mixed if one major element (docking or ground landing) was not part of the plan. Mostly false or false if the flight was crewed, was not planned to dock, or was not planned as the final uncrewed test.

Set before the research began.

1. E1 NASA, Boeing Complete Successful Landing of Starliner Flight Test - NASA NASA · 22 December 2019

   “wrapping up the company's uncrewed Orbital Flight Test as part of NASA's Commercial Crew Program.”

2. E2 NASA, Boeing Complete Successful Landing of Starliner Flight Test - NASA NASA · 22 December 2019

   “Although Starliner did not reach its planned orbit and dock to the International Space Station as planned”

3. E3 Boeing's Starliner encounters a problem: Spacecraft won't reach the space station on uncrewed test flight | CNN Business CNN · 20 December 2019

   “Starliner was scheduled to dock with the space station over the weekend, mimicking the flight path it will take when it flies its first crewed mission.”

4. E4 Boeing Software Errors Could Have Doomed Starliner's Uncrewed Test Flight SpacePolicyOnline · 7 February 2020

   “It did complete other objectives and two days later landed in White Sands, New Mexico as planned.”

NASA's releases describe the December 2019 flight as Boeing's uncrewed Orbital Flight Test, which was planned to reach orbit and dock with the ISS (E1, E2). SpacePolicyOnline reports that it landed at White Sands, New Mexico, as planned, which supports a planned ground landing (E4). CNN says the flight was meant to copy the flight path of the first crewed mission (E3), which suggests it was the last uncrewed step before crew. No source explicitly says it was the "final" uncrewed test, though, and none mentions airbags, so that detail is only partly supported.