You can usually do this by looking for an 'Add Photos' or 'Insert Images' option within the story creation interface. Then, select multiple photos from your gallery or storage.
Most apps or platforms let you add multiple photos when creating a story. First, find the photo upload button. Then, you might be able to hold down the Ctrl key (on Windows) or Command key (on Mac) to select multiple photos at once and click 'Upload' or a similar button.
To add multiple photos to your story, check the settings or toolbar of the story-making feature. There should be a way to select multiple files at once, like using the Shift key to select a range of photos or checking a box for each photo you want to include.