Hello, The_Silverback B.
Welcome to the Microsoft Community Forum. Please accept our warmest regards and sincerest hope that all is well.
From the description you have provided, you would like to know if is possible to build custom data integration blocks in Microsoft Loop.
It is indeed possible. You can use the Microsoft Power Automate platform to create custom connectors that can integrate data from external systems into Loop. Power Automate provides a wide range of pre-built connectors for popular apps. You can also create custom connectors using the Power Automate platform.
Alternatively, you can use the Microsoft Graph API to integrate data from external systems into Loop. The Graph API provides a unified endpoint for accessing data from multiple Microsoft services, including Loop. You can use the Graph API to create custom solutions that integrate data from external systems into Loop.
As explained in the link below though, Microsoft Loop is still in Public Preview. As such, there are still features that need to be improved, and so problems might still occur with my suggestion above.
If you still need more information, please provide your experience as feedback to our developers directly. They'd love to hear from you about what's working well, what's not, and any ideas for improvements, including possible new features and functions. Your contribution will help us improve the user experience for you and all users around the world.
To send us your feedback, go to the bottom right corner, select Help, > Send feedback.
On Android or iOS, tap your profile picture in the upper-left corner to find Help and feedback.
Thanks again for choosing Microsoft! We are here when you need us.
Sincerely,
Glenn Rue
Forum Moderator
Microsoft Community