Hi, there's staff training, working in partnership with parents and reviewing the environment, the strategies you've listed look good. Remember each can be broken down into more if needed for example the key-person system, the different types of observations, assessments, monitoring abnd tracking systems that your setting in particular has in place.
Page 355 of this handbook is supportive reading and
identifying and supporting children with SEND by NASEN.org.uk is good.
Best wishes