Need advice on flexibility routine

I have been doing a flexibility routine for quite some time now, the usual routine includes a bit of everything and usually takes an hour or a bit over to complete. Usually I do each static stretch for 2x30 seconds. Although I have seen linear progress taking an hour or more 5-6x a week after a heavy gym session is quite long, I'm looking for advice on how to get full body mobility without taking so much time and potentially overdoing it. Thanks to whoever took the time to read this and potentially even give knowledgeable information.

I do full body dynamic warmup before workouts and static after with a roller and massage gun as well.