A few things that have helped me:
#1 sleep in a completely dark room. A specialist MD shared this insight with me and it changed my life. I also use an eye mask and white noise machine.
#2 use a call recording tool on your internal meetings that can summarize notes. Being able to go back “in time” to a call often has enabled me to reload the entire interaction just watching a few min of the call.
#3 rely on your team. As a leader you get the benefit of the doubt that you are covering a lot, so I’ve made a ritual of just asking people to restate our last interaction and where they are at now with any updates. Again, simple thing but helps trigger my memory
Good luck!