Those are the cards that have been tested.

It is very likely that the attacks work on most or all consumer Ampere cards, depending on what kinds of GDDR memories they are using. They might also work on more recent GPUs.

However, it is true that such attacks are normally useful only on multi-user machines.

The most important thing is that the attacks are prevented by enabling the IOMMU in the BIOS. This is a setting that should always be enabled, because it prevents not only malicious attacks, but also memory corruption due to bugs.

Unfortunately, many BIOSes have the IOMMU disabled by default, for fear of creating problems for some legacy operating systems or applications.