Here is a collection of links, curated by Tarjinder Gill, to resources at Twinkl suitable for primary pupils.
https://www.twinkl.co.uk/resource/t-t-12527-mary-seacole-significant-individual-lesson-teaching-pack
https://www.twinkl.co.uk/resource/za2-t-25-the-life-story-of-nelson-mandela-powerpoint
https://www.twinkl.co.uk/resource/ks2-all-about-mae-jemison-powerpoint-t-tp-2550176