Then you have tightness that is spasm related rather than soft tissue
Best best is to try a lod of stuff out for an area and see what works.
I find doing a bit of mob work for a few days prior to training means less time needed to do anything during warm ups.
Also if I need new 'ROM' etc I'll need to work hard at mob work. Once I have got there more often than not just doing the lifts will maintain that ROM with just a little maintanence mob work.