Icons don't show up in presentation

Hello !
This is the first time I am posting here as the first time I am redesigning a landing page with Figma.
Please help on the following situation I am in:
Put some svg icons from one of the plugins and they don’t show up in prototype presentation.
What can be the problem? Thanks in advance.

The most common cause is that your icons are not inside the frame in the layer hierarchy.

I can’t decide what is a frame. The frame of the rectangle? When I select the icon from the plugin, it puts it on the top of everything. I tried to make a component with text but still doesn’t work.

A frame is what you create using the frame tool F. The “slides” you see in your presentation must be frames. Your icons must be children of the frame in the layer hierarchy.