Where notes show up depends on what note kinds the particular client supports. Olas only shows kind 20 notes, which are specifically for posting images in an image-first style client.

Primal does not support kind 20, so those notes won't show up there. Primal supports kind 1 notes and kind 30023 long-form content, but Olas does not. So notes posted on Primal will not show up on Olas.

Amethyst, on the other hand, has a feed that will display kind 20 images, so things posted to Olas will be visible there. Whether notes posted to Amethyst will also show up on Olas depends on how you post them. If you post them from your main feed, they will be kind 1 notes and will not show up in Olas, but if you post them from the media feed, they will be kind 20 and will show up in Olas, too.