do you know if SCA 2019.2 supports net terms on checkout? We were told by netsuite support that that feature is not currently supported by 2019.2.

Unless that specific version has an issue, it should work fine. I'm running a pre-denali from 2016 with terms on checkout and another 2020.1 with terms on checkout and both works well

yeah that works for me too. there is sth wrong with 2019.2