Ankle sprains or 'going over an ankle' are a very common injury but are probably underestimated. There can be rarer and more serious injuries like a ‘high ankle’ sprain which we might talk about another time, but assuming a simple, lateral ankle sprain; once injured our brain and our ankle tend to be lacking in strength, proprioception (the ability know what position the ankle and the body is in space) and power (the ability to do something about it if we are in a precarious position).
So while the swelling and pain will usually settle without much issue, if these deficiencies aren't addressed during rehabilitation, we are at a higher risk of re-injury, or developing a syndrome called chronic ankle instability - where the ankle always feels unstable and often limits people in their physical activity and all the downstream effects that has on health.
Its worth a check in with a physio or a sports physician early on to ensure you're on the best path to recovery and peak performance, and particularly if it’s not getting better within 4-6 weeks.