@vishanta121 Hello there! There is a “next story” button on the story player as you can see here. It looks like those buttons do not appear on your Stories, which could be a result of a conflict with your theme or plugin. You can test if the story play displays the button when using a default theme.
To safely simulate this, you can use the Health Check & Troubleshooting plugin and enable its troubleshooting mode. This mode disables active plugins and switches to a default theme safely because it only affects the experience of the logged-in user.
Next, enable the Web Stories plugin and view one of your stories to see if the next button displays.
Then, enable your theme and plugins one by one in this mode to help pinpoint if something else is involved.
Please let me know how you get on with this then additional support can be provided as needed.