freeradius-3.2.4 had a build failure in the snapshoot release but it builds successfully when doing a pull request
https://downloads.openwrt.org/snapshots/faillogs/aarch64_generic/packages/freeradius3/compile.txt
https://github.com/openwrt/packages/pull/24417
as a solution we need to add
PKG_BUILD_PARALLEL:=0
to prevent freeradius3 from doing the build in parallel