The Atlas fleet has migrated to Graviton (ARM) hosts, however our primary buildvariants ! Ubuntu 20.04
! Ubuntu 20.04 ASAN
! Ubuntu 20.04 Compilers
! Ubuntu 20.04 MSAN
! Ubuntu 20.04 Minimal
! Ubuntu 20.04 UBSAN
are defaulting to ubuntu2004-test which is x86. We should migrate these variants across to ARM hosts.