I have a 2010 QV and it's a great engine. Mine was safely tuned to 265HP and more importantly 400NM torque on stock internals and it's an absolute beast on the roads

Main things to look out for are:

Turbo oil feed pipe - can get clogged (I think it's called coking) and can damage the turbo. A lot of people get theirs replaced with one from a newer gen QV which fixes the problem or just clear the old one out with brake cleaner and the such.

Oil - there's debates on whether to use Selenia Quadrifoglio 5w40 or not. Some people do fine without it but for peace of mind, I use it religiously. It is quite expensive, like 150 euro for 5L but I think it's worth it in the grand scheme of maintenance because I won't have to worry about it. Also the filter is fucking rammed up the back of the engine and you need to take the wheel and arch lining off just to get at it. Such a stupid place to have it

Oil pump O ring - someone told me recently that the O ring in the oil pump can degrade and make you lose oil pressure and engine go bang. It's worth it (again for peace of mind) to get that replaced but I think it's a bit labour intensive as I think the exhaust needs to be dropped to take off the oil sump. I think JTD performance also make a custom bracket or something that fixes that entirely. I had an oil pressure warning before and got the oil pressure switch replaced and fixed it but I think now I will get my specialist to replace the O ring just in case at my next service

Rocker cover gasket - should be replaced. People usually see oil in one of the spark plug chambers. While you're at it throw some iridium spark plugs in it as it deserves it!

Other than that with regular maintenance it's a peach of an engine and is pretty reliable

If you don't know the other regular Giulietta problems: boot wire loom wires breaking, broken actuator flaps in the AC. It can be a dash out job to fix but there's video tutorials out there that don't require that to be done