Just some education blurb for anyone reading:
The SMR and stretching, when done regularly, will show results over a period of time. However, it does not create strength. It just creates room for strength to develop the right way i.e. range of motion, release inhibitions. The eccentric stuff is where resilience is built.
I’ve sprained/strained my ankles multiple times over the years and has been one of my most bugging areas that always need work. Each time, I do first aid (ice, brace if needed), then as soon as I am able I work on the mobility and tightness that has built up from the injury (band flossing, wall drills…), and immediately get on doing eccentric heel drops within pain free capacity. Eventually it would be pain free and I can push for strength.