the yamnaya influence among greeks and italians was mostly cultural and linguistic rather than genetic. in greeks and italians, the wsp/wsh admixture was minimal (<15% or no more than 20-25% in rare cases), it also comes from a different branch of the wsh (the brachycephalic one, rather than the northern dolichocephalic one that moved into scandinavia), that pushed the vinca/varna (pre-slavic population) out of the balkans and created a breed of people who then encountered proto-greeks and proto-italians. therefore, greeks and italians have wsh admixture via an off-shoot proxy population of that was 50% wsh at best, whereas other europeans received it directly. the difference between northern europeans and southern europeans (excluding balkan slavs among southern europe) are their respective wsh and eef infusion densities. greeks and italians both have large amounts of anatolian neolithic, which also partially broke off into chg (admixing into semitic populations). then there's the whg component, and between 10-20% wsh/wsp.  rome was founded by italic tribes of "indo-europeans. however, this is where academic definitions fail because those founders of rome were actually 85%+ anatolian (eaf/eef). the scholars call them indo-european because of the language they used, not because of their genetic composition. mena (middle east north africa) percentages with southern european genetic tests are remnants of early european farmer dna, technically anf, (specifically iranian neolithic/chg that derived from european anatolians), as well as more recent historical southern european admixture in semites being falsely cross referenced and backlogged into southern european results.
Australia