Need ideas for ways to bond

I have been with my fiancé for a year and a half. We are great. I have a daughter that is 3 and he has 3 daughters aged 9, 7, and 2. We moved in together in August after getting engaged in June. There was a little adjustment period where all of the kids were kind of rebelling against the blending of the family but since we got our own place instead of my daughter and I moving into their apartment, things have gone pretty smoothly. The older girls are still having a hard time adjusting. Their dad and mom have implemented them doing chores and they have fought them pretty hard. The chores aren’t hard mostly self maintenance like making their bed and putting away their own laundry. On top of keeping their room clean and feeding/watering the dog and cats. But they won’t do it because “they just don’t want to” and they’re constantly lying about any and everything they can. It is frustrating to both me and my fiancé. It’s frustrating to him because they are old enough to know what they’re expected to do and he’s having to have sit down talks with them weekly if not every night about doing better and making better decisions just for them to ignore it and do whatever they want instead. And it’s frustrating for me because I’m watching them walk all over him and disregard anything he says on top of us having to do extra cleaning because on top of not doing their own chores they are very destructive and leave massive messes everywhere they go. I want to be the fun stepmom that takes them places and does cool stuff with them but it’s impossible when they’re grounded or just being blatantly disrespectful to all of their adults. Does anyone have any advice? We don’t let them have phones or tablets so their groundings are typically them being in their room with nothing but a book to read. But we’re out of ideas because taking things away from them isn’t working. Not letting them go anywhere that isn’t school also isn’t working. Any advice would be very appreciated.