Chipset specs

https://en.wikipedia.org/wiki/List_of_AMD_chipsets

https://en.wikipedia.org/wiki/List_of_AMD_Ryzen_processors

https://www.amd.com/en/products/chipsets-am4

AMD Chipset Comparison
https://www.gamersnexus.net/guides/3582-amd-chipset-differences-b550-vs-x570-b450-x470-zen-3

https://www.gamersnexus.net/news-pc/3611-amd-a520-chipset-comparison-specs

AMD X570 Block Diagram

B550
https://www.amd.com/en/chipsets/b550

What memory has good compatibility with Ryzen CPUs?

Ryzen CPUs perform better with higher speed memory. Please note that memory compatibility at higher speeds will depend on your CPU and motherboard combination, and not just the CPU.

• Ryzen 1000 CPUs have good compatibility up to 2933MHz.
• Ryzen 2000 CPUs have good compatibility up to 3200MHz.
• Ryzen 3000 CPUs have good compatibility up to 3600MHz.
• Ryzen 5000 CPUs have good compatibility up to 3600MHz+.

Newer chipsets will have an easier time handling higher speed memory. For example, a B550 will handle higher speed memory better compared to B450.