Please expose the ability to allow additional HTML attributes in the Editor content.
===ADMIN EDIT===
Provide support for:
ProseMirror editor used by telerik, not only strips down inline elements, but also custom attributes
(like <div id="carouselExampleIndicators" class="carousel slide" data-bs-ride="true"> gets converted to <div class="carousel slide" id="carouselExampleIndicators"></div>
The same with <i> for fontawesome icons, etc....
A more complete of features editor is https://www.tiny.cloud/tinymce/features/ ...
So it is essential at least to keep all tags as they are