Your question is fine, and Marcus has given some good advice.
Generally speaking, to import questions into any LMS, you have to rely upon support from the specific LMS. You were correct in seeking Blackboard support for your question. What you have so far discovered is that you are getting more advice from Moodle's support than Blackboard's support. You might want to let your group of instructors using Blackboard know this.
Historically, I have had great success importing questions from Blackboard into Moodle. However, I have not had the need to go the other way, mainly because the universities where I have worked got rid of Blackboard many years ago. The school where I worked at around five years ago is still a Blackboard customer. This is why I switched to Moodle around 10 years ago.
Generally speaking, to import questions into any LMS, you have to rely upon support from the specific LMS. You were correct in seeking Blackboard support for your question. What you have so far discovered is that you are getting more advice from Moodle's support than Blackboard's support. You might want to let your group of instructors using Blackboard know this.
Historically, I have had great success importing questions from Blackboard into Moodle. However, I have not had the need to go the other way, mainly because the universities where I have worked got rid of Blackboard many years ago. The school where I worked at around five years ago is still a Blackboard customer. This is why I switched to Moodle around 10 years ago.