Hi N_786,
Thank you for posting in this community.
According to my research and test, if you allow multiple answers for the question 1, the Branching will not allow you to choose the next question for each option. In this situation, it is only available to let you choose the next question for the entire Question 1.
Like shown below:
E.g. whichever the user choose form the option for Question 1, it will only go to the only one question you selected.
Moreover, I am sorry that I don’t find any out of box ways in MS FORM for the user to answer question 3 and 4 without viewing question 2 during the survey
However, I understand your feelings. So, given this situation, it’s recommended to send feedback within Forms (open any Microsoft Forms form>click the three dots>Feedback).
How do I give feedback on Microsoft Office?
Since it is the quickest route to get your comments to the related programming developers’ ears. They read customer feedback daily.
Thank you for your time and understanding.
Best Regards,
May