According to the old customs and traditions, friends who move into a new house are given some daily cooking utensils such as chopsticks, bowls, basins, pots, etc. However, I personally think that you can buy a set of tea sets and tableware of good quality for your friends, preferably ones with collection value. Such gifts are not only practical, but also meaningful, and will not cause waste just because your friends already have them.
Now new houses have formaldehyde and other gases that are harmful to health. You can also give your friends an air purifier, which can purify the air and benefit your friends' health. I think your friends will like it.
You can also see what other household appliances your friends lack. If your financial scope allows, you can also give your friends the household appliances they need, such as TVs, refrigerators, etc.
Finally, if there is really nothing good to give, you can also give your friends some financial support. The economy should be tight when you just move into a new house, and giving some money is definitely a timely help for your friends.