He talks about Heartstopper (season 1) starting around the 18 minute mark. I put this in the season 1 sources list doc under a new "stuff I missed" header that I just added in. What he says about Heartstopper here is along the lines of what he's said before, i.e. he was present for everything including the handholding because the show is all about relationships and also about working with young actors and how he approaches that differently and for what reasons.