My 2018 makes the exact same noise and under the same condition of braking as yours does. I took mine to a dealership and they said the tie rods, ball joints, etc looked fine, no broken boots on anything or anything else. Took it to another dealer and they replaced the driver seat frame, but it still does it because it’s outside the car. The noise on mine comes from the driver side front wheel. It does it when the brakes are applied at low speed while going over a hump or dip in the road, and also does it when bearing left around a curve while brakes applied at low speed. Think I’ll take it back to the dealer and have them recheck the front suspension, bushings etc, and if they say everything is fine, then I’m not going to worry about it. It drives solid on the road and over bumps and such, only hear the noise under the above notes conditions. It still has the dodge factory warranties on it until 10/2021 and also purchased an extended warranty through the dealer I bought it from, so it’s cover up til 2025 or 125,000 miles and has almost 25,500 on it now. It’s a great car other than that. For my own peace of mind though I’m going to have it checked again by my dealer and won’t worry about it much after that since this seems to be an on going issue with no real permanent fixes and from what I’m hearing is mostly a quirk and not a safety hazard, which the latter is what I’m mainly concerned about. I can live with the squeak, but safety is my main concern as I drive mine pretty much daily.