x570 m.2 slots - Mainboard ASROCK X570 Taichi AM4 ATX rama 888 slot

The X570 Taichi features three PCI-E 4.0 M.2 slots, 2.4Gbps WIFI controller, an Intel Gbit NIC, tons of 10Gb/s USB, and high-end audio.

Optane™ Memory Ready for all M.2 slots. ... M2_1~2: M.2 Slots (Key M).

I need clarification. Can either m.2 slot be the boot slot? Also, do any of the sata port – Learn about ASUS - TUF GAMING X570-PLUS (WI-FI) (Socket AM4) AMD X570 ATX DDR5 Wi-Fi 6E Motherboard - Black with 1 Answer – Best Buy.