@Akoua GNANIN Thanks for posting in our Q&A. From your description, did you mean that you want to use intune to make all the feature you listed? If there is anything misunderstanding, please correct me.
Based on my research, not all features intune can make. I will list what intune can do now in the following.
Set Edge as default browser
https://www.anoopcnair.com/microsoft-edge-as-default-browser-using-intune/
Set Outlook as default
https://www.anoopcnair.com/new-outlook-as-default-mail-client-with-intune/
Set Teams Background
https://www.workplaceascode.com/2020/04/17/distribute-custom-backgrounds-for-teams-via-intune/
Note: Non-Microsoft link, just for the reference.
Hope it will help.
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