We use that, it is stuck on but found it really good!
@Jasmine ah this is the one we had but he managed to pull it off (and rip all the paint off the door 😅) thank you though! Think I just have a weirdly strong toddler x
Ikea have these door stops that kind of hold the door in place on both sides and my kids really struggle to get them off. If you are able to leave the door open like a couple of inches then they may work? They're called patrull
https://amzn.eu/d/2cHtmLL