Short antenna feedline
Research suggests the latest version of the NRF52832 contains a built in balun for 50 ohm output to make it easier to match to common antennas.  If your chip has this matching balun, then the output is already 50 ohms and with a 1cm (less than 1/4 wavelength) PCB feedline the chip antenna should match up.  Be sure the chip antenna impedance is 50 ohms. Keep your feedline straight or use 45-degree bends, to avoid introducing additional inductance if it ends up longer. This may affect placement.

However, you still need the L-network you have circled up to act as an RF choke.  Details here:

https://devzone.nordicsemi.com/f/nordic-q-a/8147/recommended-chip-antenna-debugger-for-nrf52-based-design/29286#29286

Chip antennas may also require a proper ground plane underneath them on another layer and a “keep out” area around them.

Here’s an excellent source of additional design guidance:

https://www.nxp.com/docs/en/application-note/AN2731.pdf