Answer:The availability of and speed supported by M.2 sockets on Intel 500 series motherboards may differ depending on which CPU is in use. (11th Generation or 10th Generation Intel Core processor)
For the specifications of each product, please refer to the tables below.
All of the M..2 sockets on the following models can be used in combination with 11th and 10th Generation CPUs.

Model	11th Generation	10th Generation
Z590 OC FormulaZ590 Taichi	M2_1: Gen4x4M2_2: Gen3x4+SATAM2_3: Gen3x4+SATA	M2_1: Gen3x4M2_2: Gen3x4+SATAM2_3: Gen3x4+SATA
Z590M Pro4	M2_1: Gen4x4+SATAM2_2: Gen3x4+SATA	M2_1: Gen3x4+SATAM2_2: Gen3x4+SATA
B560M Steel Legend	M2_1: Gen4x4M2_2: Gen3x4+SATA	M2_1: Gen3x4M2_2: Gen3x4+SATA
B560M-ITX/ac	M2_1: Gen4x4+SATA	M2_1: Gen3x4+SATA
H510M-HDV/M.2H510M/acH510M-ITX/ac	M2_1: Gen3x4+SATA	M2_1: Gen3x4+SATA

Some of the M.2 sockets on the following models can only be used in combination with an 11th Generation CPU.

Model	11th Generation	10th Generation
Z590 PG VelocitaZ590 Extreme WiFi 6EZ590 ExtremeZ590 Steel Legend WiFi 6EZ590 Steel LegendZ590 Pro4Z590 Phantom Gaming 4/ac+p>Z590 Phantom Gaming 4/acZ590 Phantom Gaming 4H570 Phantom Gaming 4H570 Steel Legend	M2_1: Gen4x4M2_2: Gen3x4+SATAM2_3: Gen3x4+SATA	M2_2: Gen3x4+SATAM2_3: Gen3x4+SATA
Z590M Phantom Gaming4Z590M-ITX/axH570M Pro4H570M-ITX/acB560M Pro4/ac+B560M Pro4/acB560M Pro4B560M-HDV-AB560M-HDV	M2_1: Gen4x4M2_2: Gen3x4+SATA	M2_2: Gen3x4+SATA
Z590 Phantom Gaming-ITX/TB4	M2_1: Gen3x4+SATAM2_2: Gen4x4	M2_1: Gen3x4+SATA
B560 Steel Legend	M2_1: Gen4x4M2_2: Gen3x2+SATAM2_3: Gen3x4	M2_2: Gen3x2+SATAM2_3: Gen3x4
B560 Pro4	M2_1: Gen4x4M2_2: Gen3x4M2_3: Gen3x2+SATA	M2_2: Gen3x4M2_3: Gen3x2+SATA

※M.2 sockets may share lanes with PCIe slots or SATA ports. For detailed specifications, please refer to the product page.