@Yop Thanks for posting in our Q&A. From your description, I know that we are deploying Windows MSI line-of-business app and some targeted devices status show "install pending". If there is any misunderstanding, please feel free to let us know.
For our issue, I have done some research. Here is a professional article that can be used as a reference to solve our problem, the content is very detailed.
https://techcommunity.microsoft.com/t5/intune-customer-success/support-tip-troubleshooting-msi-app-deployments-in-microsoft/ba-p/359125
Hope it can help.
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