@Asnor Mohamad Iqbal Bin Agus Salam, Thanks for posting in Q&A.
From your description, I know you want to add an application to company portal apps so that all Intune devices that use autopilot can download it from company portal.
Here are some steps you can refer.
1.Sign in Intune portal > Click Apps > Click All apps > Select the application > Click Properties > Click App information > Configure Show this as a featured app in the Company Portal Yes.
2.In the App Assignment page, assign it as Available for enrolled devices, thus the app will not automatically install unless you click it in company portal.
3.After above done, the app will show on the company portal.
Please try above information, if there any unclear, feel free to contact us.
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