I am completing my final year of the B.Ed and starting to apply for jobs. I am applying for a post in EYFS, though I have not had a placement in this setting. However, I did use my time between my course finishing in June and the end of the school year to get some experience in a Reception class in my second year- is it possible for you to get some focus days in KS2 settings in between everything else (I know its an ask!). This would demonstrate your eagerness to gain experience in a different key stage. I would go for it- it is continuing development of yourself!