yes, there is a way. you need to call this endpoint - GET /activities/{id}. You can find more information under Get Activity section here https://developers.strava.com/docs/reference/#api-Activities-getActivityById

@stevnKing This isn't supported and it wouldn't make sense because the API "speaks" on behalf of the authenticated athlete and someone can't give themselves kudos.

I understood you incorrectly the first time. I thought that you want to get a list of people that gave YOU kudos on your activities. I read once again what you want to do and it is maybe really difficult task. as @Jan_Mantau said, you would need the i.e profileIds for all athletes that you want to give kudos to.