Hello and thanks for posting! It looks as though you have opted into the new responsive engine. In the new responsive, the previous Layout Style option has been removed. This is expected, as you now control the rows & columns in the Repeating Group instead. Please feel free to reach out to Bubble Support if you have additional questions about this new setup!
My next question is then: how do I solve the issue mentioned in the screenshot? Although I fixed the rows and columns to 1, Bubble still considers the RG to be scrollable.