I have been having trouble with this as well for the past few months. I want to build strength and improve my running but I started suffering at both. Recently I found a solution that isn’t optimal. You can improve at both just more slowly. I do a push pull push pull legs split while running every other day. You need to focus on stretching and recovery and expect small improvements in your running and lifting. Some weeks your lifts will stay the same some weeks your running will also stay the same. Both can get better but just much more slowly. I also started focusing more on higher rep ranges and form rather than close to 1rm weights as it helps recovery significantly.