for medicine, my EPQ grade A gave me a lower offer (1 grade lower than standard) not sure how it is for your courses, i'd recommend checking out the course pages for the unis you're interested in to see if they value it at all. its a big undertaking and especially alongside 4 a-levels (i only do 3) i don't think it'll be a huge advantage for you on its own merit.
it was a talking point in my personal statement for being able to research and present data etc, but if your course doesn't value that over teamwork for example, i don't think it'd be a bad idea to drop it. i do think its an "easy" supercurricular (as in, you're guided through the process and there's tons of resources to help you) that shows dedication and hard work more than just a random MOOC that the uni doesn't know is reliable or challenging etc.
maybe mention it to your supervisor?