We have a good look at the Moto Z4 Play thanks to @OnLeaks. As can be seen in the renders based on leaks, the magnetic pin connectors used for Moto Mods and the iconic circular camera module are present on the Z4 Play. The fingerprint reader has been moved under the display.
Just like the G-series, the Moto Z4 lineup will also have notches; the Z4 Play here has a waterdrop-styled cutout and thankfully, Moto has kept the 3.5mm audio jack. Here's the video showing the phone: