Yes, the ACE2 receptor is how the virus gets into human cells. But, none of those papers discusses ethnic differences in ACE2 expression, which is what I haven't found any support for, and is what is behind claims it is an ethnically targeted bioweapon. It may be a bioweapon, and I'm more convinced than ever it was at least bioengineered in a lab, but that's not saying it's ethnically targeted.
Dunno if you saw it, but I posted about Shi Zhengli who tinkered with bat SARS-like viruses at the Wuhan Institute of Virology by adding the SARS ability to enter human cells with the ACE2 receptor. She also found adding chunks of HIV to them 'interesting'.
I posted about her and her work at WIV recently.
Good finds regarding ACE2 and susceptibility to SARS2.
Thanks!