Noctua’s SecuFirm2™ mounting systems are renowned to be among the most convenient on the market. This video shows how to install Noctua multi-socket CPU coolers on AMD's AM5/AM4 platforms, using the AMD offset mounting bars.
The AMD offset mounting bars are available via the Noctua website or Amazon for a service charge of EUR/USD 3.90 (website form) or EUR/USD 4.90 (Amazon) that helps to cover parts of the shipping and handling costs. Please make sure to order the correct bars for your heatsink model.
Refer to this FAQ to check which offset bars are required for which cooler model.