Thought to share our experience. Husband had a B1/B2 tourist visa interview scheduled in March in Singapore. He wanted to come visit me since I just gave birth to our daughter. We disclosed on the application that we had applied for CR1. At the interview, officer asked about the CR1 application and my husband shared that it was under process. Officer asked questions about our marriage/how we met/where we live. Application was approved granted we email a few additional documents. We sent the documents and he received the visa a few days later. He flew to the US the next day after receiving the visa. Entered the US in SF, officer just asked where he was coming from, how long he was here and purpose of his visit. So you can get a visit visa even if you applied for CR1!