Did you try it ? or you misleading me again ? First of all :
1. $ flex-builder -c openssl -a arm64 will build ubuntu:main from scratch, not yocto !
Second and the most important
Look at this:
mike-r@mike:~/work/flexbuild_lsdk1909$ flex-builder -c openssl -r yocto:tiny
COMPONENT: openssl
DISTRO TYPE: yocto
DISTRO SCALE: tiny
make: Entering directory '/home/mike-r/work/flexbuild_lsdk1909'
make[1]: Entering directory '/home/mike-r/work/flexbuild_lsdk1909/packages/apps'
make[1]: Leaving directory '/home/mike-r/work/flexbuild_lsdk1909/packages/apps'
make: Leaving directory '/home/mike-r/work/flexbuild_lsdk1909'
mike-r@mike:~/work/flexbuild_lsdk1909$
As you can see It is doing nothing because the Makefile says don't do it for yocto:tiny !!!!
@[ $(DISTROTYPE) != ubuntu -a $(DISTROTYPE) != yocto -o $(DISTROSCALE) = mate -o $(DISTROSCALE) = lite -o $(DISTROSCALE) = tiny ] && exit || \
$(call fbprint_b,"OpenSSL") && $(call fetch-git-tree,openssl) && \