in that case can you please clarify what you mean when you say “jewish features” because i’m pretty sure there’s no such thing? it’s impossible to reliably identify jewish people via phenotypical traits because we have no universally shared features, and implying that all ethnically jewish people are recognizably jewish in appearance is in fact reminiscent of race science. race and ethnicity are different things (and i sincerely hope that you meant aboriginal australian here bc i don’t know how to explain that nationality is a different thing altogether). i am both white and jewish; i have a larger than average nose and curly brown hair but so do plenty of goyim. jews of color frequently have their judaism and/or ethnicity called into question because of their race.
also the notion of converts being, like, jewish lite makes me uncomfortable as well. there are plenty of ethnically jewish people who were not raised jewish or who weren’t even aware of their jewish lineage until later in life, and it’s hard for me to see how they’ve had a materially different life experience than converts (who due to the nature of conversion tend to be quite devout in their faith—certainly moreso than me as a more or less secular jew). we make conversion very difficult to undertake for a reason.
furthermore, there are plenty of diasporic jews with no generational trauma related to the holocaust. conversely, i am patrilineally jewish and wouldn’t be considered ethnically jewish by an orthodox shul, and yet i am a direct descendent of holocaust survivors. so what exactly is the ineffable universal experience that you consider ethnic jews to possess (since you only listed two things here)? how do you propose we reliably differentiate them? are children of gerim raised in the jewish faith ethnically jewish? do you consider babies adopted into jewish families to be jewish or not?