Yes, Rocket Lab is actively pursuing smart reuse technology. Here is what they have to say on their website:
"At Rocket Lab, we view our success as the result of our determination and commitment to furthering the future of space exploration. We are passionate about smart reuse technology and are heavily investing in advanced technologies, including robotics and software, to make space access faster, more cost effective and more reliable."
Rocket Lab is developing advanced technologies that will allow them to reuse their hardware in a safe, reliable and cost-efficient way. This capability will enable Rocket Lab to leverage the reusable rocket capabilities that others such as Blue Origin and SpaceX have developed and make it successful for their own particular needs.
Rocket Lab has received funding to develop a prototype program, known as the Return To Launch Site (RTLS) program. This will enable them to reuse their launch vehicles and stages to reduce costs and increase the tempo of launches. This technology will enable Rocket Lab to rapidly re-enter their launch vehicles and stages at high speeds and in a safe manner.
So it is clear that Rocket Lab is actively pursuing smart reuse technology and is investing in advanced technologies that can enable them to be securely reused.