It's disappointing to find out that Samsung doesn't enable some of their own apps for the budget lineup. eg. M30s doesn't have support for secure folder or good lock. Pls include these features for budget phones too .
We are paying a premium over other brands for the Samsung brand name and experience, so it's not justifiable disabling features and thus spoiling the software experience. 'A' series phones do support secure folder and Knox and even my old galaxy J7 came with Knox support (later discontinued). So it's not really a compatibility issue or anything.