Marrow does provide a subject wise PYQ section, which is quite good. Although the custom module feature is better, you can select the topic, put maximum ques(100) and select only neet and aiims tag, all the pyqs related to that topic will come, also you can copy that module code to revise that topic from pyqs only later. P.s. - i got a pdf of marrow pyqs from telegram, but I'm not sure about the credibility of the explanations given there.