Yes.
The ram you linked actually has a default speed of 4800 MT/s. The 6400 MT/s speed is a faster speed that it does not run by default and is 50% higher power consumption while running.
Theoretically if you get that kit it should run at 4800 MT/s (as that is the default speed and Framework doesn’t support the higher speed), however some users have reported issues getting the Framework Laptop 16 to boot with any ram kits that don’t have a default speed of 5600 MT/s so it is safer to just get ram with a default speed of 5600 MT/s.