Well, if I didn't do it here I did it elsewhere.
I've said for years that many of the analyses of the "Greeks", particularly the earlier ones, are somewhat faulty because the academics for years only used the Thessaly samples, which plot pretty close to Tuscans, just south east of them, later added to by samples from Crete.
I know I've seen what are called "Central Greek" samples, which might perhaps include the Peloponnese? However, I can't recall any academic paper which specifically compared them to ancient Greeks.
If someone has that information, please be helpful and chime in with the links.
Someone with 100% Peloponnese ancestry should do mytrueancestry, especially someone from the more southern parts, and see how close they come to Minoans and Mycenaeans, or use something like the other ancient calculators on line. Some southern Italians have done it and certainly get hits.
Of course, what we really need to see are academic papers do the comparisons.
Fwiw.
These are some of my husband's results:
Closest ancient population:
His closest "Hellenic Roman" sample is closest to modern people from one of the Greek islands, and he shares an actual IBD segment with a Mycenaean.
Modern populations:
Since his Calabrian sides all come from areas literally a few kilometers from Greek ruins, I'm not at all surprised.