Below are two discussions on this Forum that might be what You are looking for... I have not used either one but fellow Forum Member @MarkHunte has a hand in both of these threads, and created the associated Hype Projects that I have attached here for convenience.
Since I am not privy to the details of your project I do not understand why You are assuming this set-up... but it is not required to have separate Scenes for each slide. Along these lines I do not know what "actions" You are wanting to apply. Below are two threads~posts that may prove useful for your project.
#1 - Load images from an online folder in same folder as exported HTML project: