Previous H1B rejection in 2019, new application with other employer in 2021

Previous my H1B was rejected in 2019 (lottery picked 2018)— due to insufficient documentation(StartUp - Inhouse Project)
In 2021 my employer(one of top 5 Indian IT services) applied for new H1B,now in couple of weeks my visa interview is scheduled, working for a client(well known product company) and have client letter as well

What type of question i can expect from my previous rejection

Thanks in Advance