It sounds like someone simply bought the trademark name similar to how Toys R Us is "back"
From the new QSee website:
In defining our future, we looked to our past. For the past many years, we’ve been holding your security in our hands. After a break, we are back! We are a new Qsee with a change in brand trademark ownership, new technology, new products, and a new look to be your best home security provider. And wish to rebuild clients' relationships in different ways. While many companies and global economies continue to fade and struggle to grow during the pandemic, there is one bright spot in the business landscape for Qsee to come back with more advanced technology to ease people’s daily life "Trust in us for the past 20 years".
What happened to the old Qsee and what’s the new Qsee?
True, the COVID pandemic impacted Qsee distribution and services but, The Qsee brand with its innovative home security solutions is something we cannot afford to lose. As the new owners of Qsee, we have witnessed the history of the past 20 years and we hope that we can continue its philosophy of bringing a better smart life in the future. So we are proud to promote the brand "Qsee" once again to ensure their customers with smart homes have a better smarter life with control of all Qsee products in one Qsee Smart Home App..
Qsee liability
Thank you for your past support of the Qsee brand. We are kindly notifying you that we are no longer committed to the old products of Qsee. The reason why is, We only transferred the trademark from the old Q-See. However, We do want to hold and use the old Q-See Server and hardware but unfortunately, we couldn’t, that’s the reason why old Q-See products cannot be connected to the new Qsee App. However, we will hold back the old Qsee customers with new offers exclusively only for you. We've made it easy for you to purchase new Qsee products with a fantastic discount with coupons under specific conditions.
Thank you for your interest in the new Qsee with advanced technology, high quality, and user-friendly products.
So it sounds like simply the name was acquired and none of the assets or software.