I was also looking for a feature like this. The way Bunpro is set up now, it seems like it is great for reviewing what you already know and cramming for a JLPT exam, but not as great for learning new things (especially for tricky lessons like verb tenses). So I was looking for a way to say, spend 5-10 minutes going through all of the 12 sentences in a grammar lesson until I can answer them all, then put them into the normal SRS queue for reviewing to solidify it in my brain.
There are two ways I can see this being done:
Put a “Cram this lesson” button on each lesson page that allows the user to practice that specific new lesson.
Put a “Select for Cram” button on the Grammar page that allows the user to select multiple lessons to cram.
I think both options would be very useful. Thank you for considering this feature @Pushindawood!