Aboout performance improvements to the model view.

If you have more than 50 relations, you will need to manually add the table to the layout page to redisplay the relations.
This operation may not be necessary depending on the user, so prepare an option that can turn this behavior ON / OFF.

Aboout performance improvements to the model view
-------
https://powerbi.microsoft.com/en-us/blog/power-bi-november-2020-feature-summary/#_Toc55467054
Performance Improvements
We have made some performance improvements to the model view. If you have a large model (more than 50 tables), instead of trying to show all your tables and hitting performance errors, Power BI will load and let you decide the layouts that you would like to work with.
-------