Binary package “libc6-lse” in ubuntu focal

GNU C Library: Shared Libraries

 Contains the standard libraries that are used by nearly all programs on
 the system. This package includes shared versions of the standard C library
 and the standard math library, as well as many others.
 .
 This set of libraries is optimized to support Large System Extensions (LSE).
 It only needs to be installed on ARM machine supporting LSE. If you install
 this on an machine without LSE support, it won't be used.