We literally didn't hear/see anything about Animal Crossing Pocket Camp until its direct, and the game released like the very next day in Australia.Yoshi got a gameplay demo at E3 and Kirby didn't, yet Kirby is out and Yoshi is nowhere to be seen. You never know what can happen.
Mario Kart Tour was announced January 31. I think it's reasonable to expect a little more news by now.
And unlike Kirby and Yoshi, Dragalia Lost was always planned for Summer, while Mario Kart Tour was planned to launch by March 2019.